What does this PR do?

This PR fixes website startup/build issues caused by webpack 5.106 ProgressPlugin validation and aligns dependency locking with the repository's npm-based CI workflow.

Related Issue

Fixes #
Ref: facebook/docusaurus#11923

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)

Changes Made

• Added website/scripts/ensure-skills-data.mjs to create src/data/skills.json with [] when missing (local dev/build safety guard).
• Added ensure-skills-data script and wired it into prestart and prebuild in website/package.json.
• Added npm overrides for webpackbar: ^7.0.0 in website/package.json for webpack 5.106 compatibility.
• Updated website/package-lock.json accordingly.
• Removed website/yarn.lock to keep lockfile strategy consistent with npm CI (npm ci).

How to Test

1. cd website
2. npm ci
3. (Optional) rm -f src/data/skills.json
4. npm run build
5. npm run start

Expected:

• No ValidationError: Progress Plugin failure.
• No Module not found for src/data/skills.json.
• Website compiles successfully.

Checklist

Code

• I've read the Contributing Guide
• My commit messages follow Conventional Commits
• My PR contains only changes related to this fix
• I've tested on my platform: macOS (darwin)

Documentation & Housekeeping

• I've considered cross-platform impact (N/A for behavior beyond website build/start flow)
• Other checklist items are N/A for this change

Screenshots / Logs

npm run build passes with this change. Existing Docusaurus broken link/anchor warnings are pre-existing documentation issues and are outside the scope of this PR.