[ACHIEVEMENT] Exploratory: shadow built-in keybindings for command-usage achievements

[BoxBoxJason]

Note

This issue was generated using AI, if anything lacks clarity or context, please ask for clarification before starting work.

Summary

A bigger family of "shortcut" achievement ideas — Command Palette opened,
Quick Open / Go to File, Find & Replace opened, Rename Symbol, Go to
Definition, Format Document, Toggle Zen Mode, etc. Unlike paste (#16, via the
official Document Paste API), VS Code has no public "a command was
executed" event, so the only way to observe usage of a specific built-in
command is to contribute a package.json keybinding that shadows VS Code's
default binding for the same key, run the original command via
vscode.commands.executeCommand(...), and increment a progression as a side
effect.

Why this is flagged exploratory, not ready-to-build

• Collision risk with user rebinds. If a user has already remapped one of
  these keys, our contributed keybinding either won't fire (if theirs takes
  precedence) or double-fires/conflicts (depending on when clause
  specificity) — unlike the paste API approach, which doesn't touch
  keybindings at all.
• Platform-specific bindings. Needs separate mac/key entries and
  when clauses matching VS Code's own defaults exactly (e.g.
  editorTextFocus), which differ per command and per OS.
• Blast radius if wrong. A mistake here degrades a core editing shortcut
  for every user of the extension, not just achievement tracking — much
  higher stakes than any other listener in this codebase, all of which are
  purely observational.

Suggested approach if pursued

Pilot with a single low-traffic, rarely-remapped command first — Rename
Symbol (F2) is a reasonable candidate — validate manually in the Extension
Development Host on macOS, Windows, and Linux, confirm the original command
still fires correctly and no keybinding regression occurs, before deciding
whether to build out the rest of the family.

Candidate commands

Command	Default keybinding
Command Palette	Ctrl+Shift+P / Cmd+Shift+P
Quick Open / Go to File	Ctrl+P / Cmd+P
Find & Replace	Ctrl+H / Cmd+Option+F
Rename Symbol	F2
Go to Definition	F12
Format Document	Shift+Alt+F / Shift+Option+F
Toggle Zen Mode	Ctrl+K Z / Cmd+K Z

Estimated effort: medium per command once the pattern is proven, plus a
non-trivial manual cross-platform validation pass before each ships.