Add support for npm-groovy-lint (#4495)

* Add support for npm-groovy-lint

* Add doc and tests for npm-groovy-lint

* Use ale#util#FuzzyJSONDecode instead of json_decode

doc/ale-groovy.txt

@@ -0,0 +1,42 @@
+===============================================================================
+ALE Groovy Integration                                     *ale-groovy-options*
+
+
+===============================================================================
+Integration Information
+
+Linting and fixing of Groovy files is enabled with the integration of
+`npm-groovy-lint`.
+
+
+===============================================================================
+npm-groovy-lint                                    *ale-groovy-npm-groovy-lint*
+
+g:ale_groovy_npmgroovylint_executable   *g:ale_groovy_npmgroovylint_executable*
+                                        *b:ale_groovy_npmgroovylint_executable*
+  Type: |String|
+  Default: `'npm-groovy-lint'`
+
+  Location of the npm-groovy-lint binary file.
+
+
+g:ale_groovy_npmgroovylint_options         *g:ale_groovy_npmgroovylint_options*
+                                           *b:ale_groovy_npmgroovylint_options*
+  Type: |String|
+  Default: `'--loglevel warning'`
+
+  Additional npm-groovy-lint linter options.
+
+
+g:ale_groovy_npmgroovylint_fix_options *g:ale_groovy_npmgroovylint_fix_options*
+                                       *b:ale_groovy_npmgroovylint_fix_options*
+  Type: |String|
+  Default: `'--fix'`
+
+  This variable can be used to configure fixing with npm-groovy-lint. It must
+  contain either `--fix` or `--format` for the fixer to work. See
+  `npm-groovy-lint --help` for more information on possible fix rules.
+
+
+===============================================================================
+  vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

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

@@ -223,6 +223,8 @@ Notes:
   * `eslint`
   * `gqlint`
   * `prettier`
+* Groovy
+  * `npm-groovy-lint`
 * Hack
   * `hack`
   * `hackfmt`

doc/ale.txt

@@ -1642,6 +1642,7 @@ g:ale_linters                                                   *g:ale_linters*
   \   'csh': ['shell'],
   \   'elixir': ['credo', 'dialyxir', 'dogma'],
   \   'go': ['gofmt', 'golint', 'gopls', 'govet'],
+  \   'groovy': ['npm-groovy-lint'],
   \   'hack': ['hack'],
   \   'help': [],
   \   'inko': ['inko'],
@@ -2995,6 +2996,8 @@ documented in additional help files.
     eslint................................|ale-graphql-eslint|
     gqlint................................|ale-graphql-gqlint|
     prettier..............................|ale-graphql-prettier|
+  groovy..................................|ale-groovy-options|
+    npm-groovy-lint.......................|ale-groovy-npm-groovy-lint|
   hack....................................|ale-hack-options|
     hack..................................|ale-hack-hack|
     hackfmt...............................|ale-hack-hackfmt|