feat(plugin-typescript): add TS core logic

[BioPhoton]

part of #902

[github-actions]

Code PushUp

🤨 Code PushUp report has both improvements and regressions – compared target commit 8aa298b with source commit fc53905.

🕵️ See full comparison in Code PushUp portal 🔍

🏷️ Categories

🏷️ Category	⭐ Previous score	⭐ Current score	🔄 Score change
Performance	🟡 54	🔴 50
Documentation	🔴 23	🔴 23
Code coverage	🟢 91	🟢 91
Security	🟡 79	🟡 79	–
Updates	🟡 77	🟡 77	–
Accessibility	🟢 92	🟢 92	–
Best Practices	🟢 100	🟢 100	–
SEO	🟡 61	🟡 61	–
Bug prevention	🟢 100	🟢 100	–
Code style	🟢 100	🟢 100	–

👍 1 group improved, 👎 2 groups regressed, 👍 4 audits improved, 👎 5 audits regressed, 14 audits changed without impacting score

🗃️ Groups

🔌 Plugin	🗃️ Group	⭐ Previous score	⭐ Current score	🔄 Score change
Lighthouse	Performance	🟡 54	🔴 50
JSDoc coverage	Documentation coverage	🔴 23	🔴 23
Code coverage	Code coverage metrics	🟢 91	🟢 91

15 other groups are unchanged.

🛡️ Audits

🔌 Plugin	🛡️ Audit	📏 Previous value	📏 Current value	🔄 Value change
Lighthouse	Largest Contentful Paint	🟨 3.3 s	🟨 3.7 s
Lighthouse	First Contentful Paint	🟨 2.7 s	🟨 3.0 s
JSDoc coverage	Functions coverage	🟥 439 undocumented functions	🟥 447 undocumented functions
Lighthouse	Time to Interactive	🟥 13.5 s	🟥 13.1 s
JSDoc coverage	Variables coverage	🟥 195 undocumented variables	🟥 200 undocumented variables
JSDoc coverage	Types coverage	🟥 201 undocumented types	🟥 209 undocumented types
Code coverage	Line coverage	🟨 89.7 %	🟨 89.8 %
Code coverage	Function coverage	🟩 93 %	🟩 92.9 %
Code coverage	Branch coverage	🟨 86 %	🟨 86 %
Lighthouse	Avoids enormous network payloads	🟩 Total size was 1,820 KiB	🟩 Total size was 1,817 KiB
Lighthouse	Metrics	🟩 100%	🟩 100%
Lighthouse	JavaScript execution time	🟥 6.9 s	🟥 6.5 s
Lighthouse	Minimizes main-thread work	🟥 14.0 s	🟥 14.4 s
Lighthouse	Uses efficient cache policy on static assets	🟨 27 resources found	🟨 27 resources found
Lighthouse	Total Blocking Time	🟥 3,750 ms	🟥 3,520 ms
Lighthouse	Max Potential First Input Delay	🟥 1,500 ms	🟥 1,690 ms
Lighthouse	Initial server response time was short	🟩 Root document took 520 ms	🟩 Root document took 370 ms
Lighthouse	Eliminate render-blocking resources	🟥 Potential savings of 920 ms	🟥 Potential savings of 1,030 ms
Lighthouse	Server Backend Latencies	🟩 90 ms	🟩 170 ms
Lighthouse	Speed Index	🟨 5.6 s	🟨 5.6 s
Lighthouse	Network Round Trip Times	🟩 20 ms	🟩 40 ms
Lighthouse	Avoid large layout shifts	🟩 1 layout shift found	🟩 0
Lighthouse	Cumulative Layout Shift	🟩 0	🟩 0

573 other audits are unchanged.