add CodebuffFileSystem to sdk

Author: charleslien

sdk/src/index.ts

@@ -28,7 +28,6 @@ export type { ReadyState } from '../../common/src/websockets/websocket-client'
 export { getUserInfoFromApiKey } from './impl/database'
 
 export { validateAgents } from './validate-agents'
-export type {
-  ValidationResult,
-  ValidateAgentsOptions,
-} from './validate-agents'
+export type { ValidationResult, ValidateAgentsOptions } from './validate-agents'
+
+export type { CodebuffFileSystem } from '@codebuff/common/types/filesystem'