Potential fix for code scanning alert no. 3: Workflow does not contain permissions

[Simek]

Potential fix for https://github.com/react-native-community/directory/security/code-scanning/3

In general, the problem is fixed by explicitly specifying a permissions block in the workflow (either at the root level or inside each job) to scope GITHUB_TOKEN to the minimum required privileges, typically contents: read for CI jobs that only need to read the repository. This overrides potentially broader repository/organization defaults.

For this workflow, the best fix without changing existing behavior is to add a root-level permissions section right after the name (or before jobs:) that grants only contents: read. The job only checks out the code, installs dependencies, and runs tests/lint/build, and the third-party action that receives the GITHUB_TOKEN only needs to read repository contents to compare lockfiles, so contents: read is sufficient and safe. No other permissions (like pull-requests: write) are needed, since the workflow does not modify PRs or issues. The only file to edit is .github/workflows/code-lint-and-test.yml, adding a few lines; no imports or other code changes are required.

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