style: enforce LuaJIT syntax, switch collapse_simple_statement to "Never"

[dlyongemallo]

The stylua.toml is inconsistent with the code base as it hasn't been enforced. This brings it back into sync and enforces the style in the CI.

[Copilot]

Pull request overview

This PR aligns the repository’s Lua formatting with the intended StyLua configuration (including LuaJIT syntax) and adds CI enforcement so formatting drift is caught automatically.

Changes:

• Update stylua.toml to use syntax = "LuaJIT" and set collapse_simple_statement = "Never".
• Reformat Lua source + test files to match the updated StyLua rules.
• Add a GitHub Actions lint job that runs stylua --check on lua/.

Reviewed changes

Copilot reviewed 123 out of 125 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
stylua.toml	Updates StyLua formatting rules (LuaJIT syntax + statement collapsing).
.github/workflows/ci.yml	Adds CI lint job to enforce StyLua formatting.
lua/diffview/vcs/utils.lua	StyLua-driven reformatting.
lua/diffview/vcs/rev.lua	StyLua-driven reformatting.
lua/diffview/vcs/log_entry.lua	StyLua-driven reformatting.
lua/diffview/vcs/init.lua	StyLua-driven reformatting.
lua/diffview/vcs/flag_option.lua	StyLua-driven reformatting.
lua/diffview/vcs/file_dict.lua	StyLua-driven reformatting.
lua/diffview/vcs/file.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/p4/rev.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/null/rev.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/null/init.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/jj/init.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/hg/rev.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/hg/commit.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/git/rev.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/git/parser.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapters/git/commit.lua	StyLua-driven reformatting.
lua/diffview/vcs/adapter.lua	StyLua-driven reformatting.
lua/diffview/ui/panels/help_panel.lua	StyLua-driven reformatting.
lua/diffview/ui/panels/commit_log_panel.lua	StyLua-driven reformatting.
lua/diffview/ui/panel.lua	StyLua-driven reformatting.
lua/diffview/ui/models/file_tree/node.lua	StyLua-driven reformatting.
lua/diffview/ui/model.lua	StyLua-driven reformatting.
lua/diffview/tests/helpers.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/wrap_entries_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/window_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/view_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/utils_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/toggle_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/standard_view_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/set_revs_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/selections_api_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/selection_store_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/pathlib_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/null_adapter_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/node_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/nil_guards_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/misc_fixes_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/keymap_save_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/job_utils_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/inline_diff_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/hg_adapter_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/gitsigns_autocmd_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/git_parser_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/git_merge_matrix_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/fold_limit_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/focus_diff_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/file_history_render_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/file_entry_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/file_diff_view_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/event_emitter_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/diff_view_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/config_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/config_options_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/config_features_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/browser_and_restore_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/bootstrap_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/async_guards_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/actions_spec.lua	StyLua-driven reformatting.
lua/diffview/tests/functional/actions_features_spec.lua	StyLua-driven reformatting.
lua/diffview/stream.lua	StyLua-driven reformatting.
lua/diffview/selection_store.lua	StyLua-driven reformatting.
lua/diffview/scene/window.lua	StyLua-driven reformatting.
lua/diffview/scene/views/standard/standard_view.lua	StyLua-driven reformatting.
lua/diffview/scene/views/file_history/render.lua	StyLua-driven reformatting.
lua/diffview/scene/views/file_history/option_panel.lua	StyLua-driven reformatting.
lua/diffview/scene/views/file_history/file_history_view.lua	StyLua-driven reformatting.
lua/diffview/scene/views/file_history/file_history_panel.lua	StyLua-driven reformatting.
lua/diffview/scene/views/diff/render.lua	StyLua-driven reformatting.
lua/diffview/scene/views/diff/listeners.lua	StyLua-driven reformatting.
lua/diffview/scene/views/diff/file_panel.lua	StyLua-driven reformatting.
lua/diffview/scene/views/diff/file_diff_view.lua	StyLua-driven reformatting.
lua/diffview/scene/view.lua	StyLua-driven reformatting.
lua/diffview/scene/layouts/diff_4.lua	StyLua-driven reformatting.
lua/diffview/scene/layouts/diff_3.lua	StyLua-driven reformatting.
lua/diffview/scene/layouts/diff_2.lua	StyLua-driven reformatting.
lua/diffview/scene/layouts/diff_1_inline.lua	StyLua-driven reformatting.
lua/diffview/scene/layouts/diff_1.lua	StyLua-driven reformatting.
lua/diffview/scene/layout.lua	StyLua-driven reformatting.
lua/diffview/scene/file_entry.lua	StyLua-driven reformatting.
lua/diffview/perf.lua	StyLua-driven reformatting.
lua/diffview/path.lua	StyLua-driven reformatting.
lua/diffview/oop.lua	StyLua-driven reformatting.
lua/diffview/multi_job.lua	StyLua-driven reformatting.
lua/diffview/mock.lua	StyLua-driven reformatting.
lua/diffview/logger.lua	StyLua-driven reformatting.
lua/diffview/lib.lua	StyLua-driven reformatting.
lua/diffview/lazy.lua	StyLua-driven reformatting.
lua/diffview/job.lua	StyLua-driven reformatting.
lua/diffview/init.lua	StyLua-driven reformatting.
lua/diffview/hl.lua	StyLua-driven reformatting.
lua/diffview/health.lua	StyLua-driven reformatting.
lua/diffview/ffi.lua	StyLua-driven reformatting.
lua/diffview/events.lua	StyLua-driven reformatting.
lua/diffview/diff.lua	StyLua-driven reformatting.
lua/diffview/debounce.lua	StyLua-driven reformatting.
lua/diffview/control.lua	StyLua-driven reformatting.
lua/diffview/config.lua	StyLua-driven reformatting.
lua/diffview/async.lua	StyLua-driven reformatting.
lua/diffview/arg_parser.lua	StyLua-driven reformatting.
lua/diffview/api/views/diff/diff_view.lua	StyLua-driven reformatting.
lua/diffview/api/selections.lua	StyLua-driven reformatting.
lua/diffview/api/init.lua	StyLua-driven reformatting.

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