Updated agent.py as per latest ADK version

Update README.md with Architecture diagram

Update README.md

Update README.md

Update README.md

Update README.md

Add comprehensive README with documentation and examples

fix package import

fix package import

update GCS storage tools and fixed requirementx.txt

removed state tool , centralized default values , updated agent instruction

Fix indendation for state tools

Merge branch 'master'

Initial commit for ADK and Vertex AI RAG Engine

Initial commit for ADK and Vertex AI RAG Engine