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/sublime/README.md

@@ -0,0 +1,35 @@
+# Ludic for Sublime Text
+
+Sublime reads TextMate grammars directly, so the shared grammar works as-is.
+
+1. **Highlighting.** Copy `tools/editors/shared/ludic.tmLanguage.json` into your
+   `Packages/User/` directory, renamed to `Ludic.tmLanguage.json`. Sublime picks
+   up `.ludic` from the grammar's `fileTypes`.
+
+2. **Markdown fences.** Copy
+   `tools/editors/shared/ludic.markdown-injection.json` alongside it as
+   `Ludic Markdown.tmLanguage.json`. Sublime honours `injectionSelector`, so
+   ` ```ludic ` blocks in Markdown are highlighted with no further setup.
+
+3. **Everything else** comes from the language server. Install
+   [LSP](https://packagecontrol.io/packages/LSP), then add to
+   `Preferences -> Package Settings -> LSP -> Settings`:
+
+```json
+{
+  "clients": {
+    "ludic": {
+      "enabled": true,
+      "command": ["/path/to/gpp/build/ludic-lsp", "--stdio"],
+      "selector": "source.ludic | text.html.markdown",
+      "initializationOptions": {
+        "compilerPath": "/path/to/gpp/build/ludicc",
+        "compilerDiagnostics": true,
+        "indentSize": 2
+      }
+    }
+  }
+}
+```
+
+Format on save with `LSP-format-on-save`, or bind `lsp_format_document`.