Add PWA support

[No767]

Summary

Adds in PWA support via vite-plugin-pwa to provide support for Progressive Web Apps (PWA). I.e., you can install the website like an app on your phone/tablet/desktop.

Types of changes

What types of changes does your code introduce to the UC Merced's ACM Chapter Website?
Put an x in the boxes that apply

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (Updates to README.md, the documentation, etc)
• Other (if none of the other choices apply)

Checklist

Put an x in the boxes that apply

• If code changes were made then they have been tested.
• All workflows pass with my new changes
• This PR does not address a duplicate issue or PR

[netlify]

✅ Deploy Preview for ucmacm ready!

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Lighthouse	1 paths audited Performance: 79 Accessibility: 97 Best Practices: 92 SEO: 83 PWA: 100 View the detailed breakdown and full score reports

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud