fix: update deprecated gemini model references to 2.5 #1601

[prashant1s]

Summary

[Updates documentation references and JSDoc comments to replace deprecated Gemini 1.5 and 2.0 model examples with the current stable Gemini 2.5 series.]

Changes

• [packages/compiler/src/_base.ts: Updated the models parameter example to use gemini-2.5-flash instead of the deprecated version.]
• [packages/compiler/src/lib/lcp/api/index.ts: Updated the @param modelId documentation in _createAiModel to reference gemini-2.5-flash.]

Testing

Business logic tests added:

• [This is a documentation/comment update only and does not modify application logic]
• []
• All tests pass locally

Visuals

Required for UI/UX changes:

• Documentation update only
• Video demo for interactions (< 30s)

Checklist

• Changeset added (if version bump needed)
• Tests cover business logic (not just happy path)
• No breaking changes (or documented below)

Closes #[1601]

[The-Best-Codes]

Gemini 2.0 Flash isn't deprecated.
https://ai.google.dev/gemini-api/docs/deprecations#:~:text=February%205%2C%202025-,Earliest%20February%202026,-Including%20gemini%2D2