Add ccls support for C/C++/ObjC

doc/ale-c.txt

@@ -281,5 +281,36 @@ g:ale_c_uncrustify_options                         *g:ale_c_uncrustify_options*
   This variable can be change to modify flags given to uncrustify.
 
 
+===============================================================================
+ccls                                                               *ale-c-ccls*
+
+g:ale_c_ccls_executable                               *g:ale_c_ccls_executable*
+                                                      *b:ale_c_ccls_executable*
+  Type: |String|
+  Default: `'ccls'`
+
+  This variable can be changed to use a different executable for ccls.
+
+
+g:ale_c_ccls_init_options                           *g:ale_c_ccls_init_options*
+                                                    *b:ale_c_ccls_init_options*
+  Type: |Dictionary|
+  Default: `{}`
+
+  This variable can be changed to customize ccls initialization options.
+  Example: >
+      {
+    \   'cacheDirectory': '/tmp/ccls',
+    \   'cacheFormat': 'binary',
+    \   'diagnostics': {
+    \     'onOpen': 0,
+    \     'opChange': 1000,
+    \   },
+    \ }
+<
+  Visit https://github.com/MaskRay/ccls/wiki/Initialization-options for all
+  available options and explanations.
+
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-cpp.txt

@@ -279,5 +279,36 @@ uncrustify                                                 *ale-cpp-uncrustify*
 See |ale-c-uncrustify| for information about the available options.
 
 
+===============================================================================
+ccls                                                             *ale-cpp-ccls*
+
+g:ale_cpp_ccls_executable                           *g:ale_cpp_ccls_executable*
+                                                    *b:ale_cpp_ccls_executable*
+  Type: |String|
+  Default: `'ccls'`
+
+  This variable can be changed to use a different executable for ccls.
+
+
+g:ale_cpp_ccls_init_options                       *g:ale_cpp_ccls_init_options*
+                                                  *b:ale_cpp_ccls_init_options*
+  Type: |Dictionary|
+  Default: `{}`
+
+  This variable can be changed to customize ccls initialization options.
+  Example: >
+      {
+    \   'cacheDirectory': '/tmp/ccls',
+    \   'cacheFormat': 'binary',
+    \   'diagnostics': {
+    \     'onOpen': 0,
+    \     'opChange': 1000,
+    \   },
+    \ }
+<
+  Visit https://github.com/MaskRay/ccls/wiki/Initialization-options for all
+  available options and explanations.
+
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-objc.txt

@@ -38,5 +38,36 @@ uncrustify                                                *ale-objc-uncrustify*
 See |ale-c-uncrustify| for information about the available options.
 
 
+===============================================================================
+ccls                                                            *ale-objc-ccls*
+
+g:ale_objc_ccls_executable                         *g:ale_objc_ccls_executable*
+                                                   *b:ale_objc_ccls_executable*
+  Type: |String|
+  Default: `'ccls'`
+
+  This variable can be changed to use a different executable for ccls.
+
+
+g:ale_objc_ccls_init_options                     *g:ale_objc_ccls_init_options*
+                                                 *b:ale_objc_ccls_init_options*
+  Type: |Dictionary|
+  Default: `{}`
+
+  This variable can be changed to customize ccls initialization options.
+  Example: >
+      {
+    \   'cacheDirectory': '/tmp/ccls',
+    \   'cacheFormat': 'binary',
+    \   'diagnostics': {
+    \     'onOpen': 0,
+    \     'opChange': 1000,
+    \   },
+    \ }
+<
+  Visit https://github.com/MaskRay/ccls/wiki/Initialization-options for all
+  available options and explanations.
+
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -34,6 +34,7 @@ CONTENTS                                                         *ale-contents*
       flawfinder..........................|ale-c-flawfinder|
       gcc.................................|ale-c-gcc|
       uncrustify..........................|ale-c-uncrustify|
+      ccls................................|ale-c-ccls|
     chef..................................|ale-chef-options|
       foodcritic..........................|ale-chef-foodcritic|
     clojure...............................|ale-clojure-options|
@@ -55,6 +56,7 @@ CONTENTS                                                         *ale-contents*
       flawfinder..........................|ale-cpp-flawfinder|
       gcc.................................|ale-cpp-gcc|
       uncrustify..........................|ale-cpp-uncrustify|
+      ccls................................|ale-cpp-ccls|
     c#....................................|ale-cs-options|
       mcs.................................|ale-cs-mcs|
       mcsc................................|ale-cs-mcsc|
@@ -185,6 +187,7 @@ CONTENTS                                                         *ale-contents*
       clang...............................|ale-objc-clang|
       clangd..............................|ale-objc-clangd|
       uncrustify..........................|ale-objc-uncrustify|
+      ccls................................|ale-objc-ccls|
     objcpp................................|ale-objcpp-options|
       clang...............................|ale-objcpp-clang|
       clangd..............................|ale-objcpp-clangd|