feat: add password strength analyzer tool (#836)

[setco-website]

• Create standalone password-analyzer.html tool
• Implement security validation rules using regex
• Integrate an interactive password generator
• Style interface with Tailwind CSS via jsDelivr CDN

Fixes #836.

What does this PR do?

Closes #836

Type of Change

• New tool
• Enhancement to existing tool
• Bug fix
• Documentation update
• Build system / infrastructure

Screenshot

Checklist

• I have read the Contributing Guide
• My branch follows the naming convention (add/tool-name, feat/description, or fix/description)
• I have tested my changes locally in at least one modern browser

For new tools:

• The tool is a single self-contained .html file in the tools/ folder
• The filename is kebab-case (e.g. json-formatter.html)
• I added an entry to data/tools.json with all required fields
• I added a screenshot as tools/<tool-name>.png next to the HTML file
• No JS frameworks (React, Vue, Angular, etc.) or heavy UI libraries (Bootstrap JS, jQuery, etc.)
• CDN links for lightweight libraries and fonts are fine — no copy-pasting library source code inline
• I ran node scripts/sort-norm.js data/tools.json to sort and normalize the tools registry
• I ran node scripts/build.js and verified the landing page renders correctly

For enhancements / bug fixes:

• I have not introduced any external dependencies
• The tool still works as a standalone single HTML file

[praveenscience]

👍