Feature: Add configurable file-exclude patterns to the Files panel

[rangerrick337]

Summary

Please add a T3-owned file-exclusion setting for the Files panel, similar to VS Code’s files.exclude.

The current Files panel can show dot-prefixed files and folders such as .agents/, .claude/, .cursor/, .vscode/, .env.example, and .gitignore. In larger workspaces these entries add a lot of noise, especially when the user normally works with application source files.

Proposed behavior

• Add a Files: Exclude setting that accepts configurable glob patterns for files and folders to hide from the Files panel.
• Include a convenient Hide dotfiles preset, equivalent to a pattern such as **/.*, with an easy way to turn it on or off.
• Allow users to add/remove patterns such as:
  • **/.git
  • **/.svn
  • **/.hg
  • **/.DS_Store
  • **/Thumbs.db
  • or project-specific folders and file types.
• Keep exclusions scoped to the Files panel (and optionally make the same setting apply to the @ file picker); do not delete files or change Git ignore rules.
• Keep .git excluded as it is today.
• Consider separate controls for file-panel exclusions and search exclusions, as VS Code does.

Why this is separate from existing requests

Discussion #7546 and issue #7558 ask for the opposite behavior: making gitignored files discoverable. This request is about presentation and reducing file-tree noise with user-defined glob patterns, including tracked dotfiles; it does not change Git ignore semantics or request access to ignored files.

[aharlap]

+1. One addition: it would help if the Files panel also read the project's .vscode/settings.json files.exclude. Some tools write their hide rules there for their own metadata folders, so a project that already hides them in VS Code would look the same in T3 with no extra setup. A "Show excluded files" toggle would keep them reachable when you need them.