feat: add PNG export with correct aspect ratio (implementation by @ru…

…izrica)

feat: add manual kerning mode with cursor-based adjustments
feat: 7 new fonts (unscii by viznut)
feat: add grey and light gray colors (excluded from randomization)
chore: update GitHub username
docs: update LICENSE copyright to Bit contributors

chore(release): prepare v0.3.0

chore(release): prepare v0.2.0

initial commit