Update Cargo.toml with workspace metadata and dependencies

[wellkilo]

• Add readme, keywords, and categories fields to root Cargo.toml
• Update repository URLs to wellkilo/codemod-pilot
• Move dependencies to workspace with centralized versioning
• Add version specifications for internal crate dependencies
• Add tempfile as dev-dependency in codemod-core

Change-Id: I4d3cc9da5ab8e033fd477107a66f5037b9506bf7

Description

Closes #

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• CI/build change
• New language support
• New built-in rule

Changes Made

How Has This Been Tested?

• Unit tests added/updated
• Integration tests added/updated
• Snapshot tests added/updated (run cargo insta review)
• Manual testing performed

Test commands run:

cargo test --workspace
cargo clippy --workspace --all-targets -- -D warnings
cargo fmt --all -- --check

Screenshots / Output

Checklist

• My code follows the project's code style (cargo fmt and cargo clippy pass)
• I have added tests that prove my fix is effective or my feature works
• New and existing unit tests pass locally with my changes
• I have updated the documentation accordingly
• I have added an entry to CHANGELOG.md under [Unreleased]
• My commit messages follow the Conventional Commits convention

Additional Notes