feat(whatsapp): 🎉 Add extended sending and template management

* Implemented new endpoints for sending various message types:
  - Audio
  - Sticker
  - Location
  - Contacts
  - Interactive messages
  - Template messages
  - Flow messages
  - Reactions
  - Marking messages as read

* Added template management endpoints:
  - List templates
  - Upload templates
  - Delete templates

* Introduced flow management endpoints:
  - List flows
  - Create flows
  - Get flow details
  - Upload flow assets
  - Publish flows
  - Delete flows

* Added phone number management endpoints:
  - List phone numbers
  - Request verification code
  - Verify code

* Enhanced media management with delete media endpoint.

* Updated dependencies.

pkg/handlers/media_management.go

@@ -0,0 +1,42 @@
+package handlers
+
+import (
+	"encoding/json"
+	"net/http"
+)
+
+// DeleteMediaFile deletes a previously uploaded media file from Meta's servers.
+// POST /api/media-delete  {"account_id","media_id"}
+func (h *Handlers) DeleteMediaFile(w http.ResponseWriter, r *http.Request) {
+	if r.Method != http.MethodPost {
+		http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
+		return
+	}
+
+	var req struct {
+		AccountID string `json:"account_id"`
+		MediaID   string `json:"media_id"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if req.MediaID == "" {
+		http.Error(w, "media_id is required", http.StatusBadRequest)
+		return
+	}
+
+	baClient, err := h.getBusinessAPIClient(req.AccountID)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if err := baClient.DeleteMedia(r.Context(), req.MediaID); err != nil {
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	writeJSON(w, map[string]string{"status": "ok"})
+}