Add agent instructions bundle editing

Expose first-class instructions bundle APIs, preserve agent prompt bundles in portability flows, and replace the Agent Detail prompts tab with file-backed bundle editing while retiring bootstrap prompt UI.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

packages/shared/src/validators/index.ts

@@ -73,6 +73,9 @@ export {
   createAgentSchema,
   createAgentHireSchema,
   updateAgentSchema,
+  agentInstructionsBundleModeSchema,
+  updateAgentInstructionsBundleSchema,
+  upsertAgentInstructionsFileSchema,
   updateAgentInstructionsPathSchema,
   createAgentKeySchema,
   wakeAgentSchema,
@@ -83,6 +86,8 @@ export {
   type CreateAgent,
   type CreateAgentHire,
   type UpdateAgent,
+  type UpdateAgentInstructionsBundle,
+  type UpsertAgentInstructionsFile,
   type UpdateAgentInstructionsPath,
   type CreateAgentKey,
   type WakeAgent,