fix: remove unused dependencies from Python template pyproject.toml f…

[notgitika]

…iles

Description

• Remove python-dotenv dependency from all 6 Python framework template pyproject.toml files (autogen, crewai, googleadk, langchain_langgraph, openaiagents, strands) — it is listed as a dependency but never imported in any template code (.env loading is handled by agentcore dev)
• Make provider-specific SDK dependencies conditional in the Strands template: anthropic, google-genai, and openai are now only included when the corresponding modelProvider is selected, instead of always installing all three

Related Issue

Closes #327

Documentation PR

N/a

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update
• Other (please describe):

Testing

How have you tested the change?

• I ran npm run test:unit and npm run test:integ
• I ran npm run typecheck
• I ran npm run lint
• If I modified src/assets/, I ran npm run test:update-snapshots and committed the updated snapshots

I also ran the CLI with the changes to see that it works!

Checklist

Yes to all

• I have read the CONTRIBUTING document
• I have added any necessary tests that prove my fix is effective or my feature works
• I have updated the documentation accordingly
• I have added an appropriate example to the documentation to outline the feature, or no new docs are needed
• My changes generate no new warnings
• Any dependent changes have been merged and published

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[github-actions]

Coverage Report

Status	Category	Percentage	Covered / Total
🔵	Lines	28.26%	1807 / 6393
🔵	Statements	27.59%	1875 / 6794
🔵	Functions	27.36%	356 / 1301
🔵	Branches	24.52%	918 / 3743

Generated in workflow #407 for commit 41bfd78 by the Vitest Coverage Report Action