Baseline: Ludic compiler + toolchain, Phase 1 syntax fixes complete

Self-hosted compiler (selfhost/*.ludic), runtime, examples, editor tooling,
and docs. Phase 1 of the syntax-redesign cohesion pass has landed:
edge-system fix, signature-query, when-alias, and the documentation truth-pass.
Suite green (14/14), C-free bootstrap fixpoint holds.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

tools/editors/shared/language-configuration.json

@@ -0,0 +1,31 @@
+{
+  "comment": "Editor mechanics that are not highlighting and not the language server: comments, bracket pairs, auto-closing, indentation triggers. VS Code reads this file directly; the JetBrains plugin implements the same rules natively; other editors can transcribe it.",
+  "comments": {
+    "lineComment": "#"
+  },
+  "brackets": [["{", "}"], ["[", "]"], ["(", ")"]],
+  "autoClosingPairs": [
+    { "open": "{", "close": "}" },
+    { "open": "[", "close": "]" },
+    { "open": "(", "close": ")" },
+    { "open": "\"", "close": "\"", "notIn": ["string", "comment"] }
+  ],
+  "surroundingPairs": [["{", "}"], ["[", "]"], ["(", ")"], ["\"", "\""]],
+  "indentationRules": {
+    "increaseIndentPattern": "^((?!//).)*(\\{[^}\"']*|\\([^)\"']*|\\[[^\\]\"']*)$",
+    "decreaseIndentPattern": "^\\s*[}\\])].*$"
+  },
+  "onEnterRules": [
+    {
+      "beforeText": "^\\s*#.*$",
+      "action": { "indent": "none", "appendText": "# " }
+    }
+  ],
+  "wordPattern": "[A-Za-z_][A-Za-z0-9_]*",
+  "folding": {
+    "markers": {
+      "start": "^\\s*#\\s*region\\b",
+      "end": "^\\s*#\\s*endregion\\b"
+    }
+  }
+}