implement code folding

README.md

@@ -13,6 +13,7 @@ That's it. (for now)
 Feature tracker:
 - Working:
   - Code completion
+  - Code folding
   - Syntax highlighting
   - Go to definition
   - Rename symbol

build.gradle.kts

@@ -26,8 +26,11 @@ repositories {
 
 dependencies {
     compileOnly(libs.annotations)
-    //TODO Switch back to upstream once https://github.com/ballerina-platform/lsp4intellij/pull/331 is merged.
+    //TODO Switch back to upstream once:
-    implementation("com.github.FalsePattern:lsp4intellij:41c9341dc9")
+    //  - https://github.com/ballerina-platform/lsp4intellij/pull/327 (with the extra fixes)
+    //  - https://github.com/ballerina-platform/lsp4intellij/pull/331
+    // Are merged.
+    implementation("com.github.FalsePattern:lsp4intellij:f385bbb726")
 }
 
 intellij {

src/main/resources/META-INF/plugin.xml

@@ -45,6 +45,10 @@
         <renamePsiElementProcessor implementation="org.wso2.lsp4intellij.contributors.rename.LSPRenameProcessor"
                                    id="LSPRenameProcessor" order="first"/>
 
+        <!-- needed for folding support -->
+        <lang.foldingBuilder language="Zig"
+                             implementationClass="org.wso2.lsp4intellij.contributors.LSPFoldingRangeProvider" id="LSPFoldingRangeProvider" order="first" />
+
         <!-- endregion LSP4IntelliJ -->
 
         <fileType name="Zig File"