feat: use html parsing for github stars badge

[amio]

To avoid the api rate limit.

By tests, this new approach is doubled in response time.

html parsing
________________________________________________________
Executed in    2.30 secs      fish           external
   usr time   20.12 millis    0.15 millis   19.98 millis
   sys time   14.54 millis    1.73 millis   12.82 millis

api requesting
________________________________________________________
Executed in    1.29 secs      fish           external
   usr time   19.28 millis    0.17 millis   19.11 millis
   sys time   13.16 millis    1.96 millis   11.20 millis

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