feat(users/Profpatsch/lyric): add vscode extension & helpers

* tap-bpm: simple CLI program that accepts key inputs and averages a
BPM value

* lyric-timing-mpv-script: If you press Ctrl+l, mpv attaches the
  current timestamp to a .lrc file named after the song.
  This is for manually timing missing songs for uploading them to
  https://lrclib.net/

* extension: vscode extension for `.lrc` files, currently with the
  following features:

    1. A “jump to LRC position” command which reads an .lrc timestamp
    from the current line and expects mpv to listen on
    `~/tmp/mpv-socket` (via `--input-ipc-server`), and will seek to
    the exact timestamp (down to the ms) in the currently playing
    song.

    2. Some initial linting warnings

      - A lint that warns if the difference to the next timestamp is
      more than 10s (which usually means there’s an instrumental and
      the previous line is stuck)

      - A lint that checks that timestamps are monotonically
      increasing

Change-Id: I32a4ac0e2c5bbe3d94e45ffcf647f81bc7c08aa0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12537
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

users/Profpatsch/lyric/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "lyric",
+  "version": "1.0.0",
+  "main": "dist/index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "type": "module",
+  "license": "GPL-3.0-or-later",
+  "description": "",
+  "dependencies": {},
+  "devDependencies": {
+    "@eslint/js": "^9.10.0",
+    "@types/eslint__js": "^8.42.3",
+    "@types/node": "^22.5.5",
+    "@typescript-eslint/parser": "^8.7.0",
+    "eslint": "^9.10.0",
+    "globals": "^15.9.0",
+    "typescript": "^5.6.2",
+    "typescript-eslint": "^8.6.0"
+  }
+}