feat: drag and drop + new canvas to support it

[olliethedev]

This one was a big rewrite and a refactor.
To support Drag and Drop functionality I needed to rethink the canvas and the renderer, these two modules are the core of the UI-Builder.

Changes in this pr:

• added dnd functionality
• updated renderer to add drop placeholders
• due to dnd drag/pan gesture I needed to rewrite the canvas implementation using react-zoom-pan-pinch lib
• due to react-zoom-pan-pinch i needed to replaced clickable-wrapper with element-selector component to work better inside the react-zoom-pan-pinch (account for scale/translation and dnd specific gestures)
• added new resizable-wrapper component for responsive page mode
• added page panel and props panel toggles to nav
• layer panel fix for text children
• fix dark/light toggle
• performance improvements
• ux improvements
• reorganized the files and folder inside the /ui-builder dir to be more intuitively placed