Map Editor Update - Bug Fixes & QOL Improvements

# Map Editor Update - Bug Fixes & QOL Improvements

Hey everyone! Just sent some updates PenguinMilk's way. Here's what's coming in the next build:

**Critical Fixes**
• Saving now actually works! Fixed the node ownership issue where nodes weren't being packed correctly in exported projects (this was already working in the editor but broken in exports)
• Rail saving no longer crashes the game - Fixed circular reference issues in meta information by converting to weak references

**Map Editor Improvements**
• Camera zone coordinates fixed - No more 128,128 offset, and negative zones now count correctly from -1
• Built-in resource menus now work properly - Plus added instructions for adding more resources in the future
• Rail mode visual feedback - Green transparent orb now shows where new path nodes will be placed
• Better scene tree navigation - Clicking objects in viewport now centers them in the scene tree
• Hovering tooltips - Shows object class when hovering over items in scene tree

**Smart Fixes**
• Respawn point auto-correction - If placed below terrain, it automatically moves to 0.5 units above terrain when testing/saving
• Rail collision fixed - Now placed correctly instead of 0.1 units below the rail (Path3D moved up, mesh moved down for proper alignment)
• Resource previews added - Built-in meshes and packed scenes now show previews

**Quality of Life**
• New folder access button - Quickly open the default map save location and log storage folder