v0.2.0 - Table feature improvements

Tables now behave more like spreadsheets.

• Active cell has a colored border set to the primary accent color
• The user can select multiple cells with a mouse drag or "Shift" + Arrow Keys on their keyboard
• Copy, paste, and delete work on multi-selected cells

UI/UX improvements

• Unified font faces
• 4px scale added to all styles and tokenized
• Light and Dark theme specific optimizations (mostly to do with shadows)