fix(scripts): font download for new Google Fonts URL format

[tomvoet]

Google Fonts API now returns opaque URLs without file extensions:
https://fonts.gstatic.com/l/font?kit=...&skey=...&v=v145

This broke the font download script which extracted the format from the URL extension:

file:///C:/Users/tomvo/git/material-design-icons/scripts/utils.js:109
    throw new Error(`${name} should be '${expected}' not '${actual}'`);
          ^

Error: font extension should be 'woff' not 'com/l/font?kit=flUhRq6tzZclQEJ-Vdg-IuiaDsNa&skey=4fbfe4498ec2960a&v=v145'
    at assertEquals (file:///C:/Users/tomvo/git/material-design-icons/scripts/utils.js:109:11)
    at parseCss (file:///C:/Users/tomvo/git/material-design-icons/scripts/font.js:73:3)
    at getFontUrl (file:///C:/Users/tomvo/git/material-design-icons/scripts/font.js:60:16)
    at process.processTicksAndRejections (node:internal/process/task_queues:103:5)
    at async next (file:///C:/Users/tomvo/git/material-design-icons/scripts/utils.js:86:18)
    at async Promise.all (index 1)
    at async apply (file:///C:/Users/tomvo/git/material-design-icons/scripts/utils.js:89:3)
    at async downloadFonts (file:///C:/Users/tomvo/git/material-design-icons/scripts/font.js:40:16)
    at async Command.<anonymous> (file:///C:/Users/tomvo/git/material-design-icons/scripts/index.js:54:5)
    at async Command.parseAsync (C:\Users\tomvo\git\material-design-icons\node_modules\commander\lib\command.js:923:5)

Solution

• Remove URL extension validation from parseCss (URLs no longer contain extensions)
• Verify font format by inspecting the downloaded file's metadata
• Add font family name verification as extra validation

Testing

Ran the script using various configurations successfully.

[tomvoet]

@marella could you take a look at this? This problem is fully breaking the use of @material-design-icons/scripts in our org.