create intellij plugin

[guodong-sq]

This plugin brings wt natively into IntelliJ. Switch worktrees from the IDE and the project updates instantly: no reload, no re-index, no waiting. It works through an atomic symlink swap under the project path. The plugin triggers a full VFS rescan, reloads open editors, rescans the index, and refreshes the file tree, diff views, and git status, all within seconds, all without reopening the project.

100% compatible with the shell CLI. The plugin reads and writes the exact same config files (~/.wt/repos/*.conf, ~/.wt/current, wt.* git config keys). Run wt switch in your terminal or click in the IDE, both sides see the change immediately. No sync, no import, no drift.

What you get

• Instant worktree switching — atomic symlink swap triggers a VFS rescan so files, diffs, and git status all update in place
• Full worktree lifecycle — create, switch, remove, and bulk-clean merged worktrees without leaving the IDE
• Live external change detection — run wt switch or wt context switch in your terminal, the plugin reloads automatically
• Shared IDE settings across worktrees — export/import .idea and .ijwb metadata to a vault so every worktree gets the same run configs, code style, and inspections
• Status bar widget — always know which worktree and branch you're on

Shell script changes

Small update to lib/wt-common for interop completeness:

• wt_read_git_config() now reads wt.contextName → sets WT_CONTEXT_NAME
• Context banner shows 📌 when context comes from git local config (vs global ~/.wt/current)