Session Management

[Unshure]

https://strandsagents.com/latest/documentation/docs/user-guide/concepts/agents/session-management/

Related Issue:
strands-agents/sdk-python#1230

This is an Epic task for session management in TS & Python, it also includes fast recovering, checkpointing, branching features.

This epic includes below tasks:

• Session Management Research: Features, Goals [☑️] https://github.com/strands-agents/docs/pull/431/files
• Session Management High Level Design [☑️] [V1] Sessions - HighLevelDesign #467
• Session Management Low Level Design [☑️][V1] Sessions - LowLevelDesign #468
• Implement POC [☑️]
• Hook Events [☑️] [V1] SessionManager - Hook - Add AgentInitilizedEvent to Hook System #511
• Storage Level Implementation [☑️] feat: sessionManager - Interface Design & Storage Implementation #520
• Business Level Implementation [♻️] feat: add session manager implementation and related tests #569
• API Bar raising [ ☑️]
• Doc update [♻️] feat: update session manager docs docs#581
• FastFollow:
  • Transcript Impementation (Chat UI Experience) [ ]