feat: Add template system to weevil new command

Implements template-based project creation allowing teams to start with
professional example code instead of empty projects.

Features:
- Two templates: 'basic' (minimal) and 'testing' (45-test showcase)
- Template variable substitution ({{PROJECT_NAME}}, etc.)
- Template validation with helpful error messages
- `weevil new --list-templates` command
- Template files embedded in binary at compile time

Technical details:
- Templates stored in templates/basic/ and templates/testing/
- Files ending in .template have variables replaced
- Uses include_dir! macro to embed templates in binary
- Returns file count for user feedback

Testing template includes:
- 3 complete subsystems (MotorCycler, WallApproach, TurnController)
- Hardware abstraction layer with mock implementations
- 45 comprehensive tests (unit, integration, system)
- Professional documentation (DESIGN_AND_TEST_PLAN.md, etc.)

Usage:
  weevil new my-robot                    # basic template
  weevil new my-robot --template testing # testing showcase
  weevil new --list-templates            # show available templates

This enables FTC teams to learn from working code and best practices
rather than starting from scratch.

templates/testing/build.gradle

@@ -0,0 +1,80 @@
+plugins {
+    id 'java'
+}
+
+repositories {
+    mavenCentral()
+    google()
+}
+
+dependencies {
+    // Testing (runs on PC without SDK)
+    testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+    testImplementation 'org.mockito:mockito-core:5.5.0'
+}
+
+java {
+    sourceCompatibility = JavaVersion.VERSION_11
+    targetCompatibility = JavaVersion.VERSION_11
+}
+
+// CRITICAL: Exclude FTC-dependent files from test compilation
+sourceSets {
+    main {
+        java {
+            exclude 'robot/hardware/FtcMotorController.java'
+            exclude 'robot/hardware/FtcDistanceSensor.java'
+            exclude 'robot/hardware/FtcGyroSensor.java'
+            exclude 'robot/opmodes/**/*.java'
+        }
+    }
+}
+
+test {
+    useJUnitPlatform()
+    testLogging {
+        events "passed", "skipped", "failed"
+        showStandardStreams = false
+        exceptionFormat = 'full'
+    }
+}
+
+// Task to deploy code to FTC SDK
+task deployToSDK(type: Copy) {
+    group = 'ftc'
+    description = 'Copy code to FTC SDK TeamCode for deployment'
+    
+    def sdkDir = 'C:\\Users\\Eric\\.weevil\\ftc-sdk'
+    
+    from('src/main/java') {
+        include 'robot/**/*.java'
+    }
+    
+    into "$sdkDir/TeamCode/src/main/java"
+    
+    doLast {
+        println '✓ Code deployed to TeamCode'
+    }
+}
+
+// Task to build APK
+task buildApk(type: Exec) {
+    group = 'ftc'
+    description = 'Build APK using FTC SDK'
+    
+    dependsOn deployToSDK
+    
+    def sdkDir = 'C:\\Users\\Eric\\.weevil\\ftc-sdk'
+    workingDir = file(sdkDir)
+    
+    if (System.getProperty('os.name').toLowerCase().contains('windows')) {
+        commandLine 'cmd', '/c', 'gradlew.bat', 'assembleDebug'
+    } else {
+        commandLine './gradlew', 'assembleDebug'
+    }
+    
+    doLast {
+        println '✓ APK built successfully'
+    }
+}