fix(tools): formatter bracket rules, LSP compiler diagnostics, vocabulary sync

- ludic-fmt: `rows[i]`, `new []int`, `s[a..b]`, `emit(`, `~x`, list-literal
  and query-tag braces stay tight; member calls hug their paren
  (`Date.new(`, `Prefab.spawn(`); `<< >> & | ^ ~` are operators and
  `&& ||` are not — mirrored in ludic_syntax.h, LudicLexer.kt and the
  TextMate grammar. 149 of 274 tracked sources failed --check before.
- ludic-lsp: `initializationOptions.compilerDiagnostics` / `compilerPath`
  are honoured — on save the document's compilation unit is compiled and
  `file:line: error: msg` is published as a "ludicc" diagnostic (the
  option had been documented but never implemented); the workspace scan
  file is per process; bracket codes spelled as char literals
- Overlay added to LUDIC_PHASES, LudicTokens.kt, ludic-mode.el and the
  grammar (the game uses it; check-vocabulary flagged the drift)
- editors: VS Code snippets/package.json/extension.js (`${workspaceFolder}`
  and `~` expansion, PATH lookup, Apache-2.0, real repo URL), Neovim root
  markers, Helix/Zed/Sublime bin/ paths, Emacs vocabulary, JetBrains
  comments; tools/editors/README.md no longer describes C tooling
- .forgejo workflows clone `${{ github.server_url }}/${{ github.repository }}`
  so a fork or mirror tests itself; the docs publish pushes the same way

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

tools/editors/vscode/src/extension.js

@@ -19,7 +19,7 @@ let output = null;
 /** Where the language server might be, in the order we should look. */
 function resolveServer(folders) {
   const configured = vscode.workspace.getConfiguration('ludic').get('server.path');
-  if (configured) return expand(configured);
+  if (configured) return expand(configured, folders);
 
   const names = ['ludic-lsp', 'ludic-lsp.exe'];
   for (const folder of folders) {
@@ -43,18 +43,26 @@ function resolveServer(folders) {
 
 function resolveCompiler(folders) {
   const configured = vscode.workspace.getConfiguration('ludic').get('compilerPath');
-  if (configured) return expand(configured);
+  if (configured) return expand(configured, folders);
   for (const folder of folders) {
     for (const rel of ['bin', 'build']) {
       const p = path.join(folder.uri.fsPath, rel, 'ludicc');
       if (isExecutable(p)) return p;
     }
   }
+  for (const dir of (process.env.PATH || '').split(path.delimiter)) {
+    const p = path.join(dir, 'ludicc');
+    if (isExecutable(p)) return p;
+  }
   return '';
 }
 
-function expand(p) {
-  return p.startsWith('~') ? path.join(os.homedir(), p.slice(1)) : p;
+/** A configured path may use `~` and `${workspaceFolder}`, so a project can point
+ *  at a sibling checkout without hard-coding one machine's home directory. */
+function expand(p, folders) {
+  const root = folders && folders.length ? folders[0].uri.fsPath : '';
+  const withRoot = p.replace(/\$\{workspaceFolder\}/g, root);
+  return withRoot.startsWith('~') ? path.join(os.homedir(), withRoot.slice(1)) : withRoot;
 }
 
 function isExecutable(p) {