v0.3.0

What's Changed

• adding cell number method and rich output by @pmaher86 in #3
• creating sphinx docs by @pmaher86 in #4
• fixing workflow by @pmaher86 in #5
• Add Symmetry and refactor parsing to preserve clues by @pmaher86 in #6
• Documentation by @pmaher86 in #7
• Depth-first search fill by @pmaher86 in #8
• adding cell shading and circling by @pmaher86 in #9
• add filter function by @pmaher86 in #10

Full Changelog: v0.2.1...v0.3.0