Fix underscore identifiers and add local plugin build workflow

.gitignore

@@ -1,3 +1,7 @@
 .DS_Store
 .idea
-out
+out
+/.gradle/
+/.intellijPlatform/
+/build/
+/scripts/local.mk

META-INF/plugin.xml

@@ -32,7 +32,7 @@
          on how to target different products -->
     <!-- uncomment to enable plugin in all products
     -->
-    <depends>com.intellij.modules.lang</depends>
+    <depends>com.intellij.modules.platform</depends>
 
     <application-components>
         <!-- Add your application components here -->

Makefile

@@ -0,0 +1,28 @@
+SCRIPTS_DIR := scripts
+LOCAL_CONFIG := $(SCRIPTS_DIR)/local.mk
+
+-include $(LOCAL_CONFIG)
+
+GRADLE ?= ./gradlew
+GRADLE_FLAGS ?= --no-daemon --no-configuration-cache
+GRADLE_ARGS ?=
+GRADLE_ENV := $(if $(JAVA_HOME),JAVA_HOME="$(JAVA_HOME)")
+
+export LOCAL_IDE_PATH MAVEN_MIRROR_URL GRADLE_PLUGIN_MIRROR_URL SKIP_INTELLIJ_AUXILIARY_TASKS GRADLE_DISTRIBUTION_URL
+
+.PHONY: build clean package verify help
+
+help:
+	@echo "make build    Build an installable plugin ZIP"
+	@echo "make verify   Validate the plugin archive structure"
+	@echo "make clean    Remove build outputs"
+	@echo "Optional local overrides: $(LOCAL_CONFIG)"
+
+build package:
+	$(GRADLE_ENV) $(SCRIPTS_DIR)/run-gradle.sh $(GRADLE) buildPlugin $(GRADLE_FLAGS) $(GRADLE_ARGS)
+
+verify:
+	$(GRADLE_ENV) $(SCRIPTS_DIR)/run-gradle.sh $(GRADLE) verifyPluginStructure $(GRADLE_FLAGS) $(GRADLE_ARGS)
+
+clean:
+	$(GRADLE_ENV) $(SCRIPTS_DIR)/run-gradle.sh $(GRADLE) clean $(GRADLE_FLAGS) $(GRADLE_ARGS)

README.md

@@ -10,7 +10,17 @@ Please see this example for a demonstration:
 ![Demonstration](https://github.com/user-attachments/assets/72001e9b-402d-4971-8a82-3375c70d858d)
 
 ## Install
-Use your IDE. Preferences/Plugins/Browse repositories and search for "camelcase".
+
+Install from the JetBrains Marketplace: open **Preferences/Settings → Plugins → Marketplace** and search for `camelcase`.
+
+To install a locally built version:
+
+1. Build the plugin with `make build`.
+2. In your IDE, open **Preferences/Settings → Plugins → ⚙ → Install Plugin from Disk…**.
+3. Select the ZIP file created under `build/distributions/`.
+4. Restart the IDE when prompted.
 
 ## Build
-Just clone this repo and open the project it in IntelliJ IDEA.
+```
+make build
+```

build.gradle.kts

@@ -0,0 +1,65 @@
+plugins {
+    java
+    id("org.jetbrains.intellij.platform") version "2.18.1"
+}
+
+group = "de.netnexus"
+version = "3.0.14"
+
+val mavenMirrorUrl = providers.environmentVariable("MAVEN_MIRROR_URL").orNull
+val localIdePath = providers.environmentVariable("LOCAL_IDE_PATH").orNull
+val skipIntelliJAuxiliaryTasks = providers.environmentVariable("SKIP_INTELLIJ_AUXILIARY_TASKS")
+    .map(String::toBoolean)
+    .getOrElse(false)
+
+repositories {
+    if (mavenMirrorUrl != null) {
+        maven(mavenMirrorUrl)
+    }
+    mavenCentral()
+    intellijPlatform {
+        defaultRepositories()
+    }
+}
+
+sourceSets {
+    main {
+        java.setSrcDirs(listOf("src"))
+        resources.srcDir(".")
+        resources.include("META-INF/**")
+    }
+}
+
+dependencies {
+    implementation("commons-lang:commons-lang:2.6")
+
+    intellijPlatform {
+        if (localIdePath != null) {
+            local(localIdePath)
+        } else {
+            intellijIdea("2026.2.2.1")
+        }
+    }
+}
+
+java {
+    toolchain {
+        languageVersion.set(JavaLanguageVersion.of(25))
+    }
+}
+
+tasks.withType<JavaCompile>().configureEach {
+    options.release.set(11)
+}
+
+intellijPlatform {
+    buildSearchableOptions = !skipIntelliJAuxiliaryTasks
+    instrumentCode = !skipIntelliJAuxiliaryTasks
+
+    pluginConfiguration {
+        ideaVersion {
+            sinceBuild = "193.5233.102"
+            untilBuild = provider { null }
+        }
+    }
+}

gradle.properties

@@ -0,0 +1,2 @@
+org.gradle.configuration-cache=true
+org.gradle.caching=true

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0.0-bin.zip
+networkTimeout=60000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists