feat(hooks): add WorkBuddy integration

[Kayphoon]

Summary

• Adds first-class WorkBuddy hook support through rtk init --workbuddy and rtk hook workbuddy.
• Uses the existing Claude-compatible hook path while writing WorkBuddy-specific settings.

Why

WorkBuddy can call a Claude-compatible PreToolUse hook and uses execute_command in IDE mode, but RTK did not have a dedicated setup or hook command for it.

Changes

• Adds WorkBuddy CLI parsing and hook dispatch.
• Adds a WorkBuddy hook adapter that preserves tool input fields and returns both updatedInput and modifiedInput.
• Writes .workbuddy/settings.json or ~/.workbuddy/settings.json with matcher Bash|execute_command.
• Adds focused tests for parsing, settings patching, and hook rewrite behavior.

Review Guide

This is intended to stack after #2065 because both integrations share the Claude-compatible hook response helper. GitHub cannot base an upstream PR on a fork-only branch, so this PR temporarily targets master and includes the earlier CodeBuddy commit until #2065 lands. Start with src/main.rs for the new CLI and hook entry points, then review src/hooks/init.rs for the WorkBuddy settings writer.

Verification

• rtk cargo test workbuddy
• rtk cargo test codebuddy
• rtk cargo fmt --all --check
• rtk cargo clippy --all-targets (exited successfully; existing warnings remain in unrelated dotnet/go/js filter files)
• rtk cargo test --all (1753 passed, 6 ignored)

Risk

Risk level: Low

Potential impact: Incorrect WorkBuddy settings could make the integration fail to rewrite commands, but the change is opt-in through rtk init --workbuddy.

Rollback plan: Revert this PR to remove the WorkBuddy CLI path, hook adapter, and settings writer.

[rtk-release-bot]

Automatic message from CI checks : It seems like this branch is targeting the wrong branch, any contribution should target develop branch.

See CONTRIBUTING.md for details.

[Kayphoon]

Closing because this was opened against master before checking the existing CodeBuddy issue/PR context. I will rebuild the WorkBuddy change on top of develop and avoid duplicating #1967.