build(local): simplify writeVersion task with WriteProperties plugin and enable build caching (#4139)

# Description of Changes

- **What was changed**:  
- Replaced the custom `writeVersion` task in `build.gradle` with the
built-in `WriteProperties` plugin configuration.
- Updated `gradle.properties` to enable `org.gradle.caching`
(uncommented) for local development.
- **Why the change was made**:  
- To reduce boilerplate and leverage Gradle’s native property-writing
capabilities for maintaining the version file.
- To improve build performance by reusing outputs via the Gradle build
cache.

- **Scope**:  
- These updates only affect local development and do not change
production or CI script

---

## Checklist

### General

- [x] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [x] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [x] I have performed a self-review of my own code
- [x] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

build.gradle

@@ -65,28 +65,11 @@ allprojects {
     }
 }
 
-tasks.register('writeVersion') {
-    def propsFile = file("$projectDir/app/common/src/main/resources/version.properties")
-    def propsDir = propsFile.parentFile
-
-    doLast {
-        if (propsDir.exists()) {
-            if (propsFile.exists()) {
-                println "File exists: $propsFile"
-            } else {
-                println "$propsFile does not exist. Creating file."
-                propsFile.createNewFile()
-            }
-        } else {
-            println "Creating directory: $propsDir"
-            propsDir.mkdirs()
-            propsFile.createNewFile()
-        }
-
-        def props = new Properties()
-        props.setProperty("version", version)
-        props.store(propsFile.newWriter(), null)
-    }
+tasks.register('writeVersion', WriteProperties) {
+    outputFile = layout.projectDirectory.file('app/common/src/main/resources/version.properties')
+    println "Writing version.properties to ${outputFile.path}"
+    comment "${new Date()}"
+    property 'version', project.provider { project.version.toString() }
 }
 
 tasks.named('createExe') {

gradle.properties

@@ -2,6 +2,7 @@
 org.gradle.parallel=true
 
 # Enables build caching to reuse outputs from previous builds for faster execution
-# org.gradle.caching=true
+org.gradle.caching=true
 
 org.gradle.build-scan=true
+# org.gradle.configuration-cache=true