Feat: Add 'app' subproject and integrate LSPlt submodule

This commit introduces the main application subproject, 'app', and sets up the necessary infrastructure for the TEESimulator.

Key changes:
*   'app' Subproject Setup: Added the new :app module with its initial structure, including build files, manifest, and Kotlin main entry point.
*   LSPlt Integration: Added the LSPlt hooking framework as a Git submodule in app/src/main/cpp/external/ and configured its use in CMake.
*   Native Build Configuration: Configured the C++ build to use LSPlt statically and compile two essential native libraries: libinject.so (for injection) and libTEESimulator.so (for interception/logic).
*   Module Packaging: Implemented complex Gradle logic within app/build.gradle.kts to automate the creation of a flashable zip module (supporting Magisk, Ksu, and Apatch) with versioning based on Git information.
*   Initial Module Files: Added the template files (module.prop, update-binary, updater-script) for the flashable module structure.

build.gradle.kts

@@ -11,6 +11,7 @@ tasks.register<KtfmtFormatTask>("format") {
     source = project.fileTree(rootDir)
     include("*.gradle.kts", "*/*.gradle.kts")
     dependsOn(":stub:ktfmtFormat")
+    dependsOn(":app:ktfmtFormat")
 }
 
 ktfmt { kotlinLangStyle() }