v0.2.0-alpha

Major changes:

• Reuse client for entire application fixing memory leak and improving performance
• Drop nightly, lemmy-lite now works on stable
• Upgrade to actix-web 3.1 from 2.1
• Drop actix-rt as a result of actix-web 3.1
• Added markdown
• Upgrade pulldown-cmark to 0.8

Minor changes:

• Added community info page
• Improved UI coloring
• Better mobile UI support including PWA
• Links are now underlined when hovered
• Many other performance and UI improvements