feat: add asp adk samples

[eliasecchig]

Migrate agents to Agent Starter Pack integration

Summary

Migrates 5 ADK agents to use uv and integrates them with the Agent Starter Pack for streamlined deployment.

Agents Updated

• python/agents/RAG
• python/agents/customer-service
• python/agents/personalized-shopping
• python/agents/software-bug-assistant
• python/agents/travel-concierge

Changes

Following the pattern from PR #351:

pyproject.toml:

• Converted from Poetry to uv format ([project], [dependency-groups])
• Updated Python requirement to >=3.10,<3.13
• Added agent-starter-pack>=0.14.1 as dev dependency
• Added [tool.agent-starter-pack] metadata with example questions
• Added tooling config (ruff, mypy, codespell, pytest)

Agent source (__init__.py):

• Added flexible authentication block for automatic GCP project detection

README.md:

• Replaced poetry install → uv sync
• Updated test/deploy commands to use uv run
• Added "Alternative: Using Agent Starter Pack" section

Lock files:

• Generated uv.lock for each agent

Testing

• All agents successfully locked dependencies with uv lock
• No code logic changes, only packaging and deployment improvements