chore: Simplify code

[kuafuRace]

📑 Description

• Simplify code about model field type
• Remove SetLocation method, only keep SetTimezone method
• Remove unused carbon errors in errors/list.go
• Add some constants, such as constellation and season constants

✅ Checks

• Added test cases for my code

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Please upload report for BASE (v1.15.x@a198fd5). Learn more about missing BASE report.

Additional details and impacted files

@@            Coverage Diff             @@
##             v1.15.x    #1004   +/-   ##
==========================================
  Coverage           ?   68.68%           
==========================================
  Files              ?      218           
  Lines              ?    18800           
  Branches           ?        0           
==========================================
  Hits               ?    12913           
  Misses             ?     5225           
  Partials           ?      662           

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[devhaozi]

LGTM

[hwbrzzl]

Amazing 👍