v0.4.0

What's Changed

• feat: can generate table of contents by @meddlin in #6
• feat: automatic text reflow while typing by @meddlin in #7
• feat: set max line length from command palette by @meddlin in #7
• feat: display max line length ruler by @meddlin in #7
• feat: set custom ruler color from command palette by @meddlin in #7

Full Changelog: v0.2.1...v0.4.0