refactor(api): restructured API for type safety, maintainability and docs generation

- These changes makes the API incombatible with previous versions
- Added new types for error handling, success responses, and health checks.
- Updated health check logic to utilize the new types for better clarity and structure.
- Refactored existing handlers to improve response consistency and error handling.
- Updated Makefile to include a new target for generating API types from Swagger.
- Updated "new agent" API to respond an encrypted cert pair

internal/route/provider/stats.go

@@ -1,61 +1,12 @@
 package provider
 
 import (
-	R "github.com/yusing/go-proxy/internal/route"
-	provider "github.com/yusing/go-proxy/internal/route/provider/types"
 	route "github.com/yusing/go-proxy/internal/route/types"
-	"github.com/yusing/go-proxy/internal/watcher/health"
+	"github.com/yusing/go-proxy/internal/types"
 )
 
-type (
-	RouteStats struct {
-		Total        uint16 `json:"total"`
-		NumHealthy   uint16 `json:"healthy"`
-		NumUnhealthy uint16 `json:"unhealthy"`
-		NumNapping   uint16 `json:"napping"`
-		NumError     uint16 `json:"error"`
-		NumUnknown   uint16 `json:"unknown"`
-	}
-	ProviderStats struct {
-		Total   uint16        `json:"total"`
-		RPs     RouteStats    `json:"reverse_proxies"`
-		Streams RouteStats    `json:"streams"`
-		Type    provider.Type `json:"type"`
-	}
-)
-
-func (stats *RouteStats) Add(r *R.Route) {
-	stats.Total++
-	mon := r.HealthMonitor()
-	if mon == nil {
-		stats.NumUnknown++
-		return
-	}
-	switch mon.Status() {
-	case health.StatusHealthy:
-		stats.NumHealthy++
-	case health.StatusUnhealthy:
-		stats.NumUnhealthy++
-	case health.StatusNapping:
-		stats.NumNapping++
-	case health.StatusError:
-		stats.NumError++
-	default:
-		stats.NumUnknown++
-	}
-}
-
-func (stats *RouteStats) AddOther(other RouteStats) {
-	stats.Total += other.Total
-	stats.NumHealthy += other.NumHealthy
-	stats.NumUnhealthy += other.NumUnhealthy
-	stats.NumNapping += other.NumNapping
-	stats.NumError += other.NumError
-	stats.NumUnknown += other.NumUnknown
-}
-
-func (p *Provider) Statistics() ProviderStats {
-	var rps, streams RouteStats
+func (p *Provider) Statistics() types.ProviderStats {
+	var rps, streams types.RouteStats
 	for _, r := range p.routes {
 		switch r.Type() {
 		case route.RouteTypeHTTP:
@@ -64,7 +15,7 @@ func (p *Provider) Statistics() ProviderStats {
 			streams.Add(r)
 		}
 	}
-	return ProviderStats{
+	return types.ProviderStats{
 		Total:   rps.Total + streams.Total,
 		RPs:     rps,
 		Streams: streams,