refactor(plugin): use OpenAPI to validate plugin configuration

[vm-001]

Summary

This PR used OpenAPI (JSON Schema) to validate plugin configuration

[codecov]

Codecov Report

❌ Patch coverage is 76.85185% with 25 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
db/entities/plugin.go	72.22%	2 Missing and 3 partials ⚠️
pkg/plugin/base.go	81.81%	2 Missing and 2 partials ⚠️
proxy/gateway.go	50.00%	2 Missing and 1 partial ⚠️
worker/worker.go	50.00%	2 Missing and 1 partial ⚠️
pkg/plugin/plugin.go	60.00%	1 Missing and 1 partial ⚠️
plugins/function/plugin.go	60.00%	2 Missing ⚠️
plugins/jsonschema_validator/plugin.go	60.00%	2 Missing ⚠️
plugins/wasm/plugin.go	60.00%	2 Missing ⚠️
plugins/webhookx_signature/plugin.go	77.77%	2 Missing ⚠️

Flag	Coverage Δ
integration	73.41% <73.14%> (-1.04%)	⬇️
integration-o11	43.69% <3.70%> (?)
unit	13.10% <5.55%> (-0.05%)	⬇️

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

Files with missing lines	Coverage Δ
admin/api/plugins.go	100.00% <100.00%> (ø)
pkg/declarative/types.go	85.71% <ø> (+5.71%)	⬆️
pkg/openapi/openapi.go	84.82% <100.00%> (+1.01%)	⬆️
pkg/plugin/registry.go	83.33% <100.00%> (ø)
plugins/plugins.go	100.00% <100.00%> (ø)
pkg/plugin/plugin.go	60.00% <60.00%> (+10.00%)	⬆️
plugins/function/plugin.go	82.60% <60.00%> (-3.11%)	⬇️
plugins/jsonschema_validator/plugin.go	69.76% <60.00%> (-11.72%)	⬇️
plugins/wasm/plugin.go	66.66% <60.00%> (-4.77%)	⬇️
plugins/webhookx_signature/plugin.go	90.90% <77.77%> (-9.10%)	⬇️
... and 4 more

... and 12 files with indirect coverage changes

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[cchenggit]

LGTM