Add Erlang Language Platform (ELP) support to Erlang (#11499)

* Add ELP LSP to Erlang

* generate docs

---------

Co-authored-by: Blaž Hrastnik <blaz@mxxn.io>

book/src/generated/lang-support.md

@@ -49,7 +49,7 @@
 | elvish | ✓ |  |  | `elvish` |
 | env | ✓ | ✓ |  |  |
 | erb | ✓ |  |  |  |
-| erlang | ✓ | ✓ |  | `erlang_ls` |
+| erlang | ✓ | ✓ |  | `erlang_ls`, `elp` |
 | esdl | ✓ |  |  |  |
 | fidl | ✓ |  |  |  |
 | fish | ✓ | ✓ | ✓ |  |

languages.toml

@@ -33,6 +33,7 @@ dot-language-server = { command = "dot-language-server", args = ["--stdio"] }
 earthlyls = { command = "earthlyls" }
 elixir-ls = { command = "elixir-ls", config = { elixirLS.dialyzerEnabled = false } }
 elm-language-server = { command = "elm-language-server" }
+elp = { command = "elp", args = ["server"] }
 elvish = { command = "elvish", args = ["-lsp"] }
 erlang-ls = { command = "erlang_ls" }
 forc = { command = "forc", args = ["lsp"] }
@@ -1800,7 +1801,7 @@ roots = ["rebar.config"]
 shebangs = ["escript"]
 comment-token = "%%"
 indent = { tab-width = 4, unit = "    " }
-language-servers = [ "erlang-ls" ]
+language-servers = [ "erlang-ls", "elp" ]
 
 [[grammar]]
 name = "erlang"