feat(user): support custom metadata

[GZTimeWalker]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 53.75303% with 191 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.80%. Comparing base (9d92b8e) to head (a2fac1e).
⚠️ Report is 1 commits behind head on work.

Files with missing lines	Patch %	Lines
src/GZCTF/Extensions/UserMetadataExtension.cs	32.23%	66 Missing and 16 partials ⚠️
src/GZCTF/Controllers/MetadataController.cs	0.00%	19 Missing ⚠️
src/GZCTF/Models/Data/UserMetadataField.cs	51.72%	13 Missing and 1 partial ⚠️
.../GZCTF/Repositories/UserMetadataFieldRepository.cs	54.83%	13 Missing and 1 partial ⚠️
src/GZCTF/Middlewares/PrivilegeAuthentication.cs	38.88%	8 Missing and 3 partials ⚠️
src/GZCTF/Models/AppDbContext.cs	86.66%	10 Missing ⚠️
src/GZCTF/Utils/Shared.cs	37.50%	10 Missing ⚠️
src/GZCTF/Controllers/AdminController.cs	22.22%	7 Missing ⚠️
src/GZCTF/Utils/RegexHelper.cs	65.00%	6 Missing and 1 partial ⚠️
src/GZCTF/Controllers/InfoController.cs	33.33%	4 Missing ⚠️
... and 10 more

Additional details and impacted files

@@            Coverage Diff             @@
##             work     #535      +/-   ##
==========================================
- Coverage   59.02%   58.80%   -0.22%     
==========================================
  Files         184      189       +5     
  Lines        9354     9659     +305     
  Branches     1135     1199      +64     
==========================================
+ Hits         5521     5680     +159     
- Misses       3409     3531     +122     
- Partials      424      448      +24     

Files with missing lines	Coverage Δ
src/GZCTF/Extensions/Startup/ServicesExtension.cs	89.10% <100.00%> (+0.22%)	⬆️
src/GZCTF/Models/Data/Division.cs	81.25% <ø> (ø)
src/GZCTF/Models/Data/Submission.cs	82.35% <100.00%> (ø)
...GZCTF/Models/Request/Account/ProfileUpdateModel.cs	100.00% <100.00%> (+100.00%)	⬆️
...CTF/Models/Request/Account/ProfileUserInfoModel.cs	100.00% <100.00%> (ø)
src/GZCTF/Models/Request/Edit/DivisionEditModel.cs	100.00% <ø> (ø)
src/GZCTF/Models/Request/Game/ScoreboardModel.cs	100.00% <100.00%> (ø)
src/GZCTF/Models/Request/Info/TeamUserInfoModel.cs	100.00% <ø> (ø)
src/GZCTF/Models/Transfer/TransferChallenge.cs	100.00% <ø> (ø)
src/GZCTF/Models/Transfer/TransferDivision.cs	100.00% <ø> (ø)
... and 28 more

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