fix: read version from root package.json in installer

[bmadcode]

Summary

• Fixed hardcoded version in installer that was showing 4.43.0 instead of 4.44.2
• Updated tools/installer/bin/bmad.js to always read version from root package.json
• Synced tools/installer/package.json to match root version (4.44.2)

Problem

When running npx bmad-method@latest install, the installer was displaying version 4.43.0 even though 4.44.2 was published. This was due to:

1. tools/installer/bin/bmad.js reading from tools/installer/package.json
2. tools/installer/package.json having a hardcoded version (4.43.0)

Solution

Updated the version loading logic to always read from the root package.json, ensuring the displayed version matches the published version.

Test plan

• Tested node tools/installer/bin/bmad.js --version - now shows 4.44.2
• Code reads from root package.json correctly
• Lint checks pass

Related to

• Similar fix was also made in v6 branch for manifest-generator.js