oauth gemini

[dglazkov]

• Switch to use OAuth for Gemini calls.
• Don't go to the server for OAuth secrets.
• docs(changeset): Switch Gemini API calls to use OAuth in A2.

[changeset-bot]

🦋 Changeset detected

Latest commit: eb20b49

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 30 packages

Name	Type
@google-labs/breadboard	Minor
@breadboard-ai/a2	Minor
@google-labs/agent-kit	Patch
@breadboard-ai/bbrt	Patch
@breadboard-ai/board-server-management	Patch
@breadboard-ai/board-server-utils	Patch
@breadboard-ai/board-server	Patch
@google-labs/breadboard-cli	Patch
@breadboard-ai/build-code	Patch
@breadboard-ai/build	Patch
@google-labs/core-kit	Patch
@breadboard-ai/data-store	Patch
@breadboard-ai/example-board-server	Patch
@breadboard-ai/example-boards	Patch
@breadboard-ai/filesystem-board-server	Patch
@google-labs/gemini-kit	Patch
@breadboard-ai/idb-board-server	Patch
@breadboard-ai/import	Patch
@google-labs/json-kit	Patch
@breadboard-ai/manifest	Patch
@google-labs/node-nursery-web	Patch
@google-labs/palm-kit	Patch
@breadboard-ai/remote-board-server	Patch
@breadboard-ai/shared-ui	Patch
@google-labs/template-kit	Patch
@breadboard-ai/unified-server	Patch
@breadboard-ai/visual-editor	Patch
@google-labs/breadboard-website	Patch
@breadboard-ai/google-drive-kit	Patch
@breadboard-ai/python-wasm	Patch

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