Add symlink script for local package testing

[brionmario]

Purpose

This pull request introduces a new workflow for testing local package changes in external projects by providing a symlink script. This script automates building packages, patching internal dependencies, and generating override snippets for different package managers. The documentation is updated to reflect this improved process, replacing the old manual npm link instructions.

The most important changes are:

Developer Experience Improvements

• Added a new symlink script to package.json that runs scripts/symlink.js, automating the preparation of local packages for external linking.
• Introduced scripts/symlink.js, which builds all packages, replaces catalog: and workspace:* dependencies with resolvable versions or file paths, and prints ready-to-paste override snippets for pnpm, npm, and Yarn.

Documentation Updates

• Updated the "Test your translation" section in CONTRIBUTING.md to describe the new symlink workflow, replacing the previous manual npm link instructions with a streamlined, script-based approach.
• Clarified the documentation navigation and section headings to reference the new symlink-based workflow.

Related Issues

• Fixes Limitations in Testing Local Packages with pnpm Due to Symlink and Dependency Resolution Issues #455

Related PRs

• N/A

Checklist

• Followed the CONTRIBUTING guidelines.
• Manual test round performed and verified.
• Documentation provided. (Add links if there are any)
• Unit tests provided. (Add links if there are any)

Security checks

• Followed secure coding standards in http://wso2.com/technical-reports/wso2-secure-engineering-guidelines?
• Confirmed that this PR doesn't commit any keys, passwords, tokens, usernames, or other secrets?

[asgardeo-github-bot]

⚠️ No Changeset found

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go.

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