[Docs] Remove some redundant notes & small updates (#2847)

* remove outdated notes

* Update general.md

* Update creating-slash-commands.md

* Update add note about interaction framework

* typo

* use xref

* Update intro.md

* improve docs workflow

* Update README.md

README.md

@@ -17,7 +17,7 @@
     <img src="https://discord.com/api/guilds/848176216011046962/widget.png" alt="Discord">
   </a>
 </p>
-Discord.Net is an unofficial .NET API Wrapper for the Discord client (https://discord.com).
+Discord.Net is an unofficial .NET API Wrapper for the Discord API (https://discord.com).
 
 ## 📄 Documentation