feat(storage): add StorageManager and cache subsystem; integrate storage into ConnectionManager and GitopsApp, migrate legacy connections, and add tests

ts/paths.ts

@@ -0,0 +1,19 @@
+import * as path from '@std/path';
+
+export interface IGitopsPaths {
+  gitopsHomeDir: string;
+  defaultStoragePath: string;
+  defaultTsmDbPath: string;
+}
+
+/**
+ * Resolve gitops paths. Accepts optional baseDir for test isolation.
+ */
+export function resolvePaths(baseDir?: string): IGitopsPaths {
+  const home = baseDir ?? path.join(Deno.env.get('HOME') ?? '/tmp', '.serve.zone', 'gitops');
+  return {
+    gitopsHomeDir: home,
+    defaultStoragePath: path.join(home, 'storage'),
+    defaultTsmDbPath: path.join(home, 'tsmdb'),
+  };
+}