Vim: fix documentation regarding node_modules

Apparently, the Vim+ALE plugin automatically loads the file from
node_modules. Document this behavior and fix misleading documentation.

Author: strager

plugin/vim/quick-lint-js.vim/doc/quick-lint-js.txt

@@ -79,12 +79,24 @@ g:ale_javascript_quick_lint_js_executable
 
 Set this variable to the path of the quick-lint-js CLI.
 
-If you want to use quick-lint-js installed in a project through NPM, try
-adding this to your vimrc file: >
+If your quick-lint-js CLI is installed outside your $PATH, add the following
+to your |vimrc| file so the Vim plugin knows where to find quick-lint-js: >
 
-    " Security risk! Someone might drop a malicious binary into a project.
-    " Beware!
-    let g:ale_javascript_quick_lint_js_executable
-        \ = 'node_modules/.bin/quick-lint-js'
+    " UNIX:
+    let g:ale_javascript_quick_lint_js_executable = '/path/to/quick-lint-js'
+    " Windows:
+    let g:ale_javascript_quick_lint_js_executable = 'C:\path\to\quick-lint-js.exe'
+
+g:ale_javascript_quick_lint_js_use_global
+				*g:ale_javascript_quick_lint_js_use_global*
+				*b:ale_javascript_quick_lint_js_use_global*
+  Type: |Boolean|
+  Default: `v:false`
+
+Set this variable to `v:false` to search for `quick-lint-js` in `node_modules`
+first, and if it's not found, use |g:ale_javascript_quick_lint_js_executable|.
+
+Set this variable to `v:true` to only use
+|g:ale_javascript_quick_lint_js_executable|.
 
  vim:tw=78:ts=8:noet:ft=help:norl:

plugin/vim/quick-lint-js.vim/doc/tags

@@ -1,5 +1,7 @@
 b:ale_javascript_quick_lint_js_executable	quick-lint-js.txt	/*b:ale_javascript_quick_lint_js_executable*
+b:ale_javascript_quick_lint_js_use_global	quick-lint-js.txt	/*b:ale_javascript_quick_lint_js_use_global*
 g:ale_javascript_quick_lint_js_executable	quick-lint-js.txt	/*g:ale_javascript_quick_lint_js_executable*
+g:ale_javascript_quick_lint_js_use_global	quick-lint-js.txt	/*g:ale_javascript_quick_lint_js_use_global*
 quick-lint-js-app-install	quick-lint-js.txt	/*quick-lint-js-app-install*
 quick-lint-js-configure	quick-lint-js.txt	/*quick-lint-js-configure*
 quick-lint-js-configure-ale	quick-lint-js.txt	/*quick-lint-js-configure-ale*