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/extension/package.json

@@ -0,0 +1,52 @@
+{
+  "name": "profpatsch-jump-to-lrc-position",
+  "displayName": "Jump to .lrc Position in mpv",
+  "description": "Reads a timestamp from the current file and pipes it to a mpv socket",
+  "version": "0.0.1",
+  "engines": {
+    "vscode": "^1.75.0"
+  },
+  "categories": [
+    "Other"
+  ],
+  "main": "./out/extension.js",
+  "activationEvents": [
+    "onLanguage:lrc"
+  ],
+  "contributes": {
+    "commands": [
+      {
+        "command": "extension.jumpToLrcPosition",
+        "title": "Jump to .lrc Position",
+        "category": "LRC"
+      }
+    ],
+    "languages": [
+      {
+        "id": "lrc",
+        "extensions": [
+          ".lrc"
+        ],
+        "aliases": [
+          "Lyric file"
+        ]
+      }
+    ]
+  },
+  "scripts": {
+    "vscode:prepublish": "npm run compile",
+    "compile": "tsc",
+    "install-extension": "vsce package --allow-missing-repository --out ./jump-to-lrc-position.vsix && code --install-extension ./jump-to-lrc-position.vsix"
+  },
+  "devDependencies": {
+    "vscode": "^1.1.37",
+    "@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"
+  }
+}