docs: add category badges from portal

[matejchalk]

Uses portal's new badges API to render live category scores for this repo. For security, the API key is restricted to read:reports scope and has access only to the Code PushUp CLI project in the portal.

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared current commit f60bf97 with previous commit 6a977d1.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Performance	🟡 54	🔴 33
Code coverage	🟢 90	🟢 90
Security	🟡 61	🟡 61	–
Updates	🟡 74	🟡 74	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 61	🟡 61	–
Type Safety	🟢 100	🟢 100	–
Bug prevention	🟢 100	🟢 100	–
Miscellaneous	🟢 100	🟢 100	–
Code style	🟢 100	🟢 100	–
Documentation	🔴 23	🔴 23	–

👍 1 group improved, 👎 1 group regressed, 👍 1 audit improved, 👎 7 audits regressed, 10 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
Lighthouse	Performance	🟡 54	🔴 33
Code coverage	Code coverage metrics	🟢 90	🟢 90

19 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Largest Contentful Paint	🟨 3.3 s	🟥 11.6 s
Lighthouse	Reduce unused JavaScript	🟨 Potential savings of 148 KiB	🟥 Potential savings of 148 KiB
Lighthouse	Remove duplicate modules in JavaScript bundles	🟨 Potential savings of 83 KiB	🟥 Potential savings of 77 KiB
Lighthouse	Speed Index	🟥 6.0 s	🟥 7.2 s
Lighthouse	Total Blocking Time	🟥 1,980 ms	🟥 3,550 ms
Lighthouse	First Contentful Paint	🟨 2.9 s	🟥 3.1 s
Lighthouse	Time to Interactive	🟥 13.3 s	🟥 14.7 s
Code coverage	Branch coverage	🟨 85.7 %	🟨 85.7 %
Lighthouse	Minimizes main-thread work	🟥 11.9 s	🟥 16.3 s
Lighthouse	JavaScript execution time	🟥 5.0 s	🟥 7.3 s
Lighthouse	Max Potential First Input Delay	🟥 1,170 ms	🟥 2,610 ms
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	Avoids enormous network payloads	🟩 Total size was 1,947 KiB	🟩 Total size was 1,947 KiB
Lighthouse	Uses efficient cache policy on static assets	🟨 30 resources found	🟨 30 resources found
Lighthouse	Server Backend Latencies	🟩 230 ms	🟩 210 ms
Lighthouse	Initial server response time was short	🟩 Root document took 510 ms	🟩 Root document took 530 ms
Lighthouse	Reduce unused CSS	🟥 Potential savings of 69 KiB	🟥 Potential savings of 69 KiB
Lighthouse	Network Round Trip Times	🟩 70 ms	🟩 70 ms

587 other audits are unchanged.