fix: GitHub Actions workflow improvements

chore: Bump version to 0.5.3

fix: Remove unused methods and eliminate build warnings

feat: Add GitHub Actions cross-platform build workflow

fix: georelays

fix: georelays

fix: update nick to use last 4 chars of pubkey

fix: channel scrolling, input box scrolling

feat: /status

fix: whois

fix: whois

feat: georelays

feat: bold and italics

feat: spam controls, /clear

fix: nsec visible in title, input scrolling