Add validate command

[raulfdm]

This pull request introduces several enhancements and fixes to the @codeowners-flow/cli package, including a new command, improved string formatting, and refactoring for better code organization and readability. The most important changes are grouped by theme below.

New Features:

• Added a new "validate" command to validate the CODEOWNERS file against a set of rules (.changeset/light-keys-crash.md, packages/cli/src/index.ts, packages/cli/src/validate-codeowners.ts, packages/cli/src/validate-codeowners.test.ts). [1] [2] [3] [4] [5]

Enhancements:

• Enhanced string formatting while generating CODEOWNERS (.changeset/chilly-clowns-start.md).
• Fixed init boilerplate to import defineConfig from CLI (.changeset/purple-candies-matter.md, packages/cli/src/init.ts, packages/cli/src/init.test.ts). [1] [2] [3] [4] [5]

Refactoring:

• Refactored generateCodeOwners function to separate concerns and improve readability (packages/cli/src/generate-codeowners.ts).
• Updated getCodeOwnersContent to use dedent for better formatting (packages/cli/src/get-codeowners-content.ts). [1] [2]

Dependency Updates:

• Added dedent dependency to package.json (packages/cli/package.json).

Codeowners Configuration:

• Simplified CODEOWNERS file by consolidating team assignments (.github/CODEOWNERS, packages/cli/src/__fixtures__/codeowners.config.mjs). [1] [2]

[changeset-bot]

🦋 Changeset detected

Latest commit: ed79437

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

This PR includes changesets to release 1 package

Name	Type
@codeowners-flow/cli	Minor

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