feat: added limit-req plugin form

[guoqqqi]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What changes will this PR take into?

Add limit-req plugin form.

Related issues

None

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[codecov-io]

Codecov Report

Merging #1732 (9461c24) into master (1fa467a) will decrease coverage by 19.11%.
The diff coverage is n/a.

❗ Current head 9461c24 differs from pull request most recent head c8cdac6. Consider uploading reports for the commit c8cdac6 to get more accurate results

@@             Coverage Diff             @@
##           master    #1732       +/-   ##
===========================================
- Coverage   71.35%   52.23%   -19.12%     
===========================================
  Files          47       38        -9     
  Lines        3128     2661      -467     
===========================================
- Hits         2232     1390      -842     
- Misses        656     1083      +427     
+ Partials      240      188       -52     

Flag	Coverage Δ
backend-e2e-test	?
backend-e2e-test-ginkgo	?
backend-unit-test	52.23% <ø> (-0.06%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
api/internal/utils/version.go	0.00% <0.00%> (-100.00%)	⬇️
api/internal/filter/request_id.go	0.00% <0.00%> (-100.00%)	⬇️
api/internal/core/entity/entity.go	0.00% <0.00%> (-100.00%)	⬇️
api/internal/core/store/storehub.go	0.00% <0.00%> (-71.03%)	⬇️
api/internal/filter/cors.go	0.00% <0.00%> (-66.67%)	⬇️
api/internal/filter/schema.go	0.00% <0.00%> (-55.47%)	⬇️
api/internal/utils/consts/api_error.go	0.00% <0.00%> (-50.00%)	⬇️
api/internal/handler/data_loader/route_import.go	27.41% <0.00%> (-37.50%)	⬇️
api/internal/handler/handler.go	42.59% <0.00%> (-35.19%)	⬇️
api/internal/handler/schema/schema.go	66.66% <0.00%> (-33.34%)	⬇️
... and 33 more

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[juzhiyuan]

Please file a new PR to add Fields Descriptions in tooltip

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[juzhiyuan]

@guoqqqi conflicts

[juzhiyuan]

Please update i18n in a new PR @guoqqqi

[guoqqqi]

OK😆