Merge https://github.com/lampepfl/dotty/blob/master/docs/docs/usage/ide-support.md here

- Only added a mention of BSP
- Skipped instructions in “importing the project using BSP using IntelliJ” because they are not working

Author: julienrf

scala3/getting-started.md

@@ -117,8 +117,9 @@ They both offer rich IDE features, but you can still use [many other editors.](h
    When prompted to do so, select _Import build_.
 
 >[Metals](https://scalameta.org/metals) is a “Scala language server” that provides support for writing Scala code in VS Code and other editors like [Atom, Sublime Text, and more](https://scalameta.org/metals/docs/editors/overview.html), using the Language Server Protocol.
-(For details on how Metals works, see, [“Write Scala in VS Code, Vim, Emacs, Atom and Sublime Text with Metals”](https://www.scala-lang.org/2019/04/16/metals.html).)
-
+>
+> Under the hood, Metals communicates with the build tool by using
+> the [Build Server Protocol (BSP)](https://build-server-protocol.github.io/). For details on how Metals works, see, [“Write Scala in VS Code, Vim, Emacs, Atom and Sublime Text with Metals”](https://www.scala-lang.org/2019/04/16/metals.html).
 
 
 ### View the source code