feat(api): create template

Add template table to the database
Create controller function to check if user has template, and create it
in the database
Made universal jwt.Claims of user data retrieval function

backend/utils/responses/responses.go

@@ -6,7 +6,7 @@ import (
 	"github.com/gin-gonic/gin"
 )
 
-func Success(c *gin.Context, data gin.H) {
+func Success(c *gin.Context, data any) {
 	// Return success to api
 	c.JSON(200, gin.H{
 		"success": true,