Add localaik - local Gemini and OpenAI API compatibility proxy

[harshaneel]

Please provide package links to:

• Forge link: https://github.com/harshaneel/localaik
• pkg.go.dev: https://pkg.go.dev/github.com/harshaneel/localaik
• goreportcard.com: https://goreportcard.com/report/github.com/harshaneel/localaik
• Coverage: https://github.com/harshaneel/localaik/actions/workflows/release.yml
• Docker Hub: https://hub.docker.com/r/gokhalh/localaik

Description:

localaik is a local compatibility proxy for the Gemini and OpenAI APIs. Run one container locally and test both SDK protocol shapes on the same port without API keys or network access.

Running integration tests for AI SDK code requires API keys set up in every environment, including CI workflows. localaik solves this with a single docker run — it translates both Gemini (/v1beta/models/{model}:generateContent) and OpenAI (/v1/chat/completions) protocols to the same upstream llama.cpp server running Gemma 3.

Make sure that you've checked the boxes below before you submit PR:

• I have added my package in alphabetical order.
• I have an appropriate description with correct grammar.
• I know that this package was not listed before.
• I have added pkg.go.dev link to the repo and to my pull request.
• I have read Contribution guidelines, maintainers note and Quality standard.

[github-actions]

Automated Quality Checks

Required checks

✅ Repo: accessible, has go.mod and SemVer release
✅ pkg.go.dev: OK
✅ Go Report Card: OK (grade unknown)

Additional checks

✅ License: MIT
⚠️ Maturity: repo appears to have less than 5 months of history

How to fix: Your repository needs at least 5 months of history since the first commit.
Please resubmit after the repository meets this requirement.
✅ CI/CD: GitHub Actions workflows detected
✅ README: present
⚠️ Coverage: missing from PR body
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Popular options: [Codecov](https://codecov.io), [Coveralls](https://coveralls.io). Integrate one with your CI to track coverage automatically.


_These checks are automated and do not replace maintainer review. See [CONTRIBUTING.md](https://github.com/avelino/awesome-go/blob/main/CONTRIBUTING.md) for full guidelines._

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## PR Diff Validation

### Content checks

✅ **Files changed**: only README.md
✅ **Single item**: one package added
✅ **Link consistency**: README link matches forge link in PR body
✅ **Link text**: matches repository name
✅ **Description**: ends with punctuation
✅ **Description tone**: no promotional language detected
✅ **Category size**: Artificial Intelligence has 12 items


_Automated diff validation — does not replace maintainer review._
<!-- Sticky Pull Request Commentpr-quality-check -->