feat: add shellcheckrc language (#14202)

runtime/queries/shellcheckrc/highlights.scm

@@ -0,0 +1,55 @@
+(comment) @comment
+(string) @string
+(boolean) @constant.builtin.boolean
+(integer) @constant.numeric.integer
+
+[
+  "disable"
+  "enable"
+  "extended-analysis"
+  "external-sources"
+  "source"
+  "source-path"
+  "shell"
+] @keyword
+
+"=" @operator
+
+[
+  ","
+  "-"
+] @punctuation.delimiter
+
+"SC" @special
+
+(shell) @type.enum.variant
+
+(all) @variable.builtin
+
+(identifier) @label
+
+(source_directive
+  (identifier) @string.special.path)
+
+(source_path_directive
+  (identifier) @string.special.path)
+
+(source_directive
+  (identifier) @variable.builtin (#eq? @variable.builtin "SCRIPTDIR"))
+
+(source_path_directive
+  (identifier) @variable.builtin (#eq? @variable.builtin "SCRIPTDIR"))
+
+(enable_directive
+  (identifier) @diagnostic.error
+  (#not-any-of? @diagnostic.error
+    "add-default-case"
+    "avoid-nullary-conditions"
+    "check-extra-masked-returns"
+    "check-set-e-suppressed"
+    "check-unassigned-uppercase"
+    "deprecate-which"
+    "quote-safe-variables"
+    "require-double-brackets"
+    "require-variable-braces"
+  ))

runtime/queries/shellcheckrc/injections.scm

@@ -0,0 +1,2 @@
+((comment) @injection.content
+  (#set! injection.language "comment"))

runtime/queries/shellcheckrc/textobjects.scm

@@ -0,0 +1,13 @@
+(comment) @comment.inside
+(comment)+ @comment.around
+
+
+[
+  (disable_directive)
+  (enable_directive)
+  (extended_analysis_directive)
+  (external_sources_directive)
+  (source_directive)
+  (source_path_directive)
+  (shell_directive)
+] @entry.around