feat(ios): launch via XCTest with env vars for hierarchy/tap access (#39)

* feat(proto): add env map to LaunchRequest

* feat(driver): add env param to Launch interface and all implementations

* feat(sidecar): add IosDriverBackend using Maestro IOSDriver + env pass-through

* feat(testrun): launch iOS app via XCTest with env vars instead of simctl

* fix(ios): replace LaunchApp with BootedUDID; simctl launch moved to XCTest path

* test(cli): add tests for ios platform flag and ios-device flag parsing

* fix(sdk-ios): check semaphore wait result; resolve port from args and env; register extractors before start

internal/driver/driver.go

@@ -10,7 +10,7 @@ import (
 // lives under driver/sidecar; the web implementation under driver/chrome;
 // tests use driver/mock.
 type DeviceDriver interface {
-	Launch(ctx context.Context, bundleID string, clearState bool) error
+	Launch(ctx context.Context, bundleID string, clearState bool, env map[string]string) error
 	Terminate(ctx context.Context) error
 
 	Tap(ctx context.Context, x, y int) error