CI: Add GitHub Actions workflow for building desktop app

This commit introduces a GitHub Actions workflow to automate the build process for the ModernADB desktop application.

The workflow will:
- Trigger on push and pull request events to the `main` and `cicd` branches.
- Build the application on `ubuntu-latest`, `windows-latest`, and `macos-latest` runners.
- Set up JDK 21 and Gradle.
- Execute the `./gradlew packageRelease` command to build the native distribution.
- Upload the resulting binaries as artifacts, named `ModernADB-${{ matrix.os }}`.

Additionally, this commit:
- Adds RPM as a target format in `composeApp/build.gradle.kts`.
- Introduces a new Gradle task `packageAll` that depends on `packageMsi`, `packageDmg`, `packageDeb`, and `packageRpm` to build all native distribution packages.

Author: laetuz

.github/workflows/build.yml

@@ -0,0 +1,38 @@
+name: Build Desktop App
+
+on:
+  push:
+    branches: [ main, cicd ] # Or whatever your main branch is
+  pull_request:
+    branches: [ main, cicd ]
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        # Define the operating systems to build on
+        os: [ubuntu-latest, windows-latest, macos-latest]
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin' # A standard, full JDK
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Build with Gradle
+        # This command will run the appropriate packaging task for the current OS
+        run: ./gradlew packageRelease
+
+      - name: Upload Artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: ModernADB-${{ matrix.os }}
+          path: composeApp/build/compose/binaries/main/release/

composeApp/build.gradle.kts

@@ -39,9 +39,24 @@ compose.desktop {
         mainClass = "id.neotica.modernadb.MainKt"
 
         nativeDistributions {
-            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb, TargetFormat.Rpm)
             packageName = "id.neotica.modernadb"
             packageVersion = "1.0.0"
         }
     }
 }
+
+// This creates a new custom task named "packageAll"
+tasks.register("packageAll") {
+    // Optional: This puts your task in a "distribution" folder in the Gradle tool window
+    group = "distribution"
+    description = "Builds all native distribution packages (MSI, DMG, DEB, RPM)."
+
+    // This is the key part: it tells Gradle to run these tasks first
+    val packageTasks = listOf("packageMsi", "packageDmg", "packageDeb", "packageRpm")
+    packageTasks.forEach { taskName ->
+        tasks.findByName(taskName)?.let {
+            dependsOn(it)
+        }
+    }
+}