feat(tooling): JetBrains IDE support, LSP navigation, barrel imports, package scripts and hooks

- JetBrains plugin 1.4.0: semantic colours (builtin / vendor / own), template strings,
  brace handling, run configurations and a test console, package.ludic and
  package.lock.ludic editing (completion, docs, app preview, colour previews, asset
  navigation), External Libraries for the runtime and packages, doc pages for built-ins
- ludic-lsp: go to definition for imports, document links, hover with inferred types,
  type definition, signature help with parameters, docs from docs/language
- `import "dir"` resolves a barrel `dir/index.ludic`
- package.ludic `entry`, `script` and `hook before|after <command>`; `ludic <script>`,
  `ludic script`, `ludic scripts`
- `ludic test --verbose` and `--test NAME`; the test runner filters by name

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

tools/ludic-cli/tools.ludic

@@ -166,7 +166,7 @@ function cmd_test_tools() -> int {
   # IntelliJ SDK). One env var away: LUDIC_TEST_JETBRAINS=1 ludic-dev test-tools
   if (getenv_or("LUDIC_TEST_JETBRAINS", "0") == "1") {
     if shq("test -x tools/editors/jetbrains/gradlew") {
-      if shq("cd tools/editors/jetbrains && ./gradlew buildPlugin verifyPluginStructure --console=plain -q >/dev/null 2>&1 && test -f build/distributions/Ludic-1.0.0.zip") { ok("jetbrains plugin builds and verifies") } else { bad("jetbrains plugin build") }
+      if shq("cd tools/editors/jetbrains && ./gradlew buildPlugin verifyPluginStructure --console=plain -q >/dev/null 2>&1 && test -f build/distributions/Ludic-1.4.0.zip") { ok("jetbrains plugin builds and verifies") } else { bad("jetbrains plugin build") }
       if shq("cd tools/editors/jetbrains && ./gradlew test --console=plain -q >/dev/null 2>&1") { ok("jetbrains platform tests (lexer, file type, PSI, folding)") } else { bad("jetbrains platform tests") }
     } else { print("  skip  jetbrains plugin (no gradle wrapper)") }
   } else {