Worf 0.4.0

What's changed

• bump version to 0.4.0 by @alexmohr
• fix shift in math mode by @alexmohr
• support floating point numbers in math mode by @alexmohr
• support auto selection without enter, fixes #83 by @alexmohr
• support Parentheses for math, fixes #79 by @alexmohr
• remove dead code by @alexmohr
• clippy warnings fix by @alexmohr
• add hyprspace workspace manager by @alexmohr
• move show into worf main out of lib by @alexmohr
• breaking api changes: improve API for gui and reduce cloning by @alexmohr
• fix blurred background, fix launcher theme by @alexmohr

Full Changelog: 0.3.0...0.4.0