feat(update): pass tg Entities to Update

[fluffur]

Access raw tg.Entities from update

bot.OnMessage(func(c *botapi.Context) error {
		c.Update.Entities // tg.Entities
})

[codecov]

Codecov Report

❌ Patch coverage is 23.52941% with 13 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.57%. Comparing base (ec97c6a) to head (2863d26).
⚠️ Report is 4 commits behind head on main.

Files with missing lines	Patch %	Lines
on.go	18.75%	9 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #464      +/-   ##
==========================================
- Coverage   78.89%   78.57%   -0.32%     
==========================================
  Files         118      118              
  Lines        8359     8361       +2     
==========================================
- Hits         6595     6570      -25     
  Misses       1237     1237              
- Partials      527      554      +27     

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