feat: add xml & dtd parsers

queries/xml/highlights.scm

@@ -0,0 +1,53 @@
+; inherits: dtd
+
+;; XML declaration
+
+(XMLDecl "standalone" @tag.attribute)
+
+(XMLDecl [ "yes" "no" ] @boolean)
+
+;; Processing instructions
+
+(XmlModelPI "xml-model" @preproc)
+
+(StyleSheetPI "xml-stylesheet" @preproc)
+
+(PseudoAtt (Name) @tag.attribute)
+
+(PseudoAtt (PseudoAttValue) @string)
+
+;; Doctype declaration
+
+(doctypedecl "DOCTYPE" @define)
+
+(doctypedecl (Name) @type.definition)
+
+;; Tags
+
+(STag (Name) @tag)
+
+(ETag (Name) @tag)
+
+(EmptyElemTag (Name) @tag)
+
+;; Attributes
+
+(Attribute (Name) @tag.attribute)
+
+(Attribute (AttValue) @string)
+
+;; Text
+
+(CharData) @text @spell
+
+((CDSect
+  (CDStart) @text.environment
+  (CData) @text.literal
+  "]]>" @text.environment)
+ (#set! "priority" 105))
+
+;; Delimiters & punctuation
+
+[ "<" "</" "/>" ] @tag.delimiter
+
+"]" @punctuation.bracket