refactor: Restructure monorepo to apps/server/ and apps/web/ layout

Move src/ → apps/server/ and packages/web/ → apps/web/ to adopt
standard monorepo conventions (apps/ for runnable apps, packages/
for reusable libraries). Update all config files, shared package
imports, test fixtures, and documentation to reflect new paths.

Key fixes:
- Update workspace config to ["apps/*", "packages/*"]
- Update tsconfig.json rootDir/include for apps/server/
- Add apps/web/** to vitest exclude list
- Update drizzle.config.ts schema path
- Fix ensure-schema.ts migration path detection (3 levels up in dev,
  2 levels up in dist)
- Fix tests/integration/cli-server.test.ts import paths
- Update packages/shared imports to apps/server/ paths
- Update all docs/ files with new paths

apps/server/agent/providers/parsers/index.ts

@@ -0,0 +1,31 @@
+/**
+ * Stream Parser Registry
+ *
+ * Factory function to get the appropriate stream parser for a provider.
+ */
+
+import type { StreamParser } from '../stream-types.js';
+import { ClaudeStreamParser } from './claude.js';
+import { GenericStreamParser } from './generic.js';
+
+/** Map of provider names to parser constructors */
+const parserRegistry: Record<string, new () => StreamParser> = {
+  claude: ClaudeStreamParser,
+};
+
+/**
+ * Get a stream parser for the given provider.
+ * Returns a provider-specific parser if available, otherwise the generic fallback.
+ */
+export function getStreamParser(providerName: string): StreamParser {
+  const ParserClass = parserRegistry[providerName];
+  if (ParserClass) {
+    return new ParserClass();
+  }
+  return new GenericStreamParser();
+}
+
+// Re-export types and parsers for direct access
+export type { StreamParser, StreamEvent } from '../stream-types.js';
+export { ClaudeStreamParser } from './claude.js';
+export { GenericStreamParser } from './generic.js';