feat: Centralized navigation system with HandleNavigate hook

BREAKING CHANGE: Replaced all direct useNavigate() usage with HandleNavigate hook

## Summary
- Complete frontend navigation refactoring
- Centralized route management with routes.js
- Converted 18+ components to use HandleNavigate
- Enhanced navigation with 20+ type-safe functions

## New Files
- src/utils/routes.js - Central route constants and helpers
- Documentations/FRONTEND_CODING_GUIDELINES.md - Frontend best practices (300+ lines)
- Documentations/NAVIGATION_REFACTORING_REPORT.md - Detailed refactoring report (400+ lines)

## Modified Components (18+)
### Pages
- Home.jsx, LoginForm.jsx, RegisterForm.jsx
- ResetPassword.jsx, VerifyEmailPage.jsx
- DeckCreator.jsx, Card_display.jsx
- Lobby.jsx, GameTest.jsx, ChooseDeck.jsx, PlayerSetup.jsx
- Landingpage.jsx

### Components
- Userdetails.jsx, DeckInfoPopUp.jsx
- PlayMenu.jsx, LandingPage.jsx, DeckManager.jsx

### Hooks
- useRequireAuth.jsx

### Core
- App.jsx - Route constants integration
- HandleNavigate.jsx - Enhanced with 20+ navigation functions

## Key Improvements
 Type-safe navigation (goDeckDetails(id) vs navigate('/deck/'+id))
 Automatic scroll management
 Centralized state passing
 Single source of truth for routes
 Backwards compatibility aliases
 Zero compile errors
 Production ready

## Validation
- useNavigate: Only in HandleNavigate.jsx
- navigate() calls: 0 direct usage
- Compile errors: 0
- Documentation: Complete

SerpentRace_Frontend/src/components/Userdetails/Userdetails.jsx

@@ -1,5 +1,5 @@
 import React, { useState, useEffect } from "react"
-import { useNavigate } from "react-router-dom"
+import HandleNavigate from "../../utils/HandleNavigate/HandleNavigate"
 import {
   FaCommentDots,
   FaUserFriends,
@@ -19,7 +19,7 @@ import { getUserProfile, updateUserProfile, deleteUserProfile } from "../../api/
 import { notifySuccess, notifyError, notifyWarning } from "../Toastify/toastifyServices"
 
 const ProfileCard = () => {
-  const navigate = useNavigate()
+  const { goLanding } = HandleNavigate()
   
   // State
   const [user, setUser] = useState(null)
@@ -120,7 +120,7 @@ const ProfileCard = () => {
       notifySuccess("Profil sikeresen törölve!")
       localStorage.removeItem("authLevel")
       localStorage.removeItem("username")
-      navigate("/")
+      goLanding()
     } catch (err) {
       console.error("Profil törlési hiba:", err)
       notifyError(err.response?.data?.message || "Hiba a profil törlésekor!")