chore: refactor Gradle config, standardize Kotlin MPP plugin usage, and update dependencies

- Unified plugin application across modules using `alias(libs.plugins.*)` instead of hardcoded IDs.
- Removed redundant JVM/JS source map tasks, improving Gradle and Docker build consistency.
- Updated dependencies, including `logback` and Webpack `copy-webpack-plugin`, and added contextual documentation.
- Added frontend architecture diagram in PlantUML (`docs/01_Architecture/Reference`), standardizing feature-core-shell dependencies.

frontend/core/network/build.gradle.kts

@@ -1,11 +1,9 @@
 @file:OptIn(ExperimentalKotlinGradlePluginApi::class)
 
 import org.jetbrains.kotlin.gradle.ExperimentalKotlinGradlePluginApi
-import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 
 plugins {
-  // Fix for "Plugin loaded multiple times": Apply plugin by ID without version (inherited from root)
-  id("org.jetbrains.kotlin.multiplatform")
+  alias(libs.plugins.kotlinMultiplatform)
   alias(libs.plugins.kotlinSerialization)
 }
 
@@ -13,12 +11,7 @@ kotlin {
   jvm()
   js {
     binaries.library()
-    // Re-enabled browser environment after Root NodeJs fix
-    browser {
-        testTask {
-            enabled = false
-        }
-    }
+    browser()
   }
 
   sourceSets {
@@ -41,10 +34,3 @@ kotlin {
     }
   }
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinCompile> {
-  compilerOptions {
-    jvmTarget.set(JvmTarget.JVM_25)
-    freeCompilerArgs.addAll("-opt-in=kotlin.RequiresOptIn")
-  }
-}