refactor(core): Use DI in source-control. add more tests (#12554)

packages/cli/src/environments.ee/source-control/source-control.config.ts

@@ -0,0 +1,8 @@
+import { Config, Env } from '@n8n/config';
+
+@Config
+export class SourceControlConfig {
+	/** Default SSH key type to use when generating SSH keys. */
+	@Env('N8N_SOURCECONTROL_DEFAULT_SSH_KEY_TYPE')
+	defaultKeyPairType: 'ed25519' | 'rsa' = 'ed25519';
+}