Update documentation

[infeeeee]

• Changed recommended install method to pipx
• Moved development docs to a separate file, added my notes
• Added a doc about autostart methods, it can useful until autostart is not implemented
• Copied important comments from #94

@inobrevi Thank you for your comment about autostarting on Windows! Added to docs/Autostart tips.md

@richibrics You can commit here your updated HA screenshots from #81

Closes #94