Selection improvements

When copying, you can now:

• Rotate with Q and E
• Mirror vertically with R

Rewrites

Changes for you:

• Mirroring switches is now bound to R
• F picks the item under the cursor
• Ctrl+X cuts the selection
• You now have to press shift to keep cloning

Changes for me:

• Rewrote the renderer
• Rewrote the input system

0.0.1-2 (breaking changes)

• Fixes a bug with copy ghost centering
• Adds double-sided mirrors. ⚠️ breaks 0.0.1-1 saves

Alpha preview release

Please view the README for controls.