Support gleamlsp language server for gleam (#4696)

doc/ale-gleam.txt

@@ -0,0 +1,23 @@
+===============================================================================
+ALE Gleam Integration                                       *ale-gleam-options*
+                                                        *ale-integration-gleam*
+
+===============================================================================
+Integration Information
+
+  Currently, the only supported linter for gleam is gleamlsp.
+
+
+===============================================================================
+gleamlsp                                                   *ale-gleam-gleamlsp*
+
+g:ale_gleam_gleamlsp_executable               *g:ale_gleam_gleamlsp_executable*
+                                              *b:ale_gleam_gleamlsp_executable*
+  Type: |String|
+  Default: `'gleam'`
+
+  This variable can be modified to change the executable path for `gleamlsp`.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-supported-languages-and-tools.txt

@@ -202,6 +202,8 @@ Notes:
   * `fusion-lint`
 * Git Commit Messages
   * `gitlint`
+* Gleam
+  * `gleamlsp`
 * GLSL
   * `glslang`
   * `glslls`

doc/ale.txt

@@ -3031,6 +3031,8 @@ documented in additional help files.
     fusion-lint...........................|ale-fuse-fusionlint|
   git commit..............................|ale-gitcommit-options|
     gitlint...............................|ale-gitcommit-gitlint|
+  gleam...................................|ale-gleam-options|
+    gleamlsp..............................|ale-gleam-gleamlsp|
   glsl....................................|ale-glsl-options|
     glslang...............................|ale-glsl-glslang|
     glslls................................|ale-glsl-glslls|