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/editors/jetbrains/gradle.properties

@@ -1,11 +1,12 @@
 pluginGroup = io.ludic.ide
 pluginName = Ludic
-pluginVersion = 1.0.0
+pluginVersion = 1.4.0
 
-# 2023.2 is the first build with the platform APIs this plugin uses. LSP4IJ (not
-# the paid-IDE LSP API) supplies the language-server bridge, so Community
-# editions are supported as well as Ultimate.
-pluginSinceBuild = 232
+# 2024.2 (242) is the oldest platform LSP4IJ 0.20+ installs on, so it is the
+# floor here too: claiming older would let an IDE accept this plugin and then
+# fail to find its required dependency. LSP4IJ (not the paid-IDE LSP API)
+# supplies the language-server bridge, so the free IDEs are supported as well.
+pluginSinceBuild = 242
 # Deliberately ahead of the newest released platform (2025.3 is build 253): an
 # until-build that stops at today's IDE gets the plugin auto-disabled the moment
 # a user upgrades. 262 buys roughly three release cycles of headroom. The APIs
@@ -15,7 +16,7 @@ pluginSinceBuild = 232
 pluginUntilBuild = 262.*
 
 platformVersion = 2025.3
-lsp4ijVersion = 0.20.1
+lsp4ijVersion = 0.21.0
 
 # Gradle itself must run on JDK 17-21; a newer JDK reports only its version
 # number as the failure. The Kotlin toolchain below is pinned separately.