List of Documentation changes

[nitin710]

• WiFi credentials FAQ post
  • A post describing in depth what can go wrong and how to fix it
  • Failure modes
    • Wrong name of config file e.g. config(1).txt, config.txt.txt etc
• Stacking gif
  • Use the correct feather
  • Push feather all the way in
  • Push the battery all the way in
• Windows defender permissions asset
• Add gif to indicate programmer LED pulsating under the section For advanced users
• fix #83
• Add assets into the firmware installer section
• fix #84