Add tree-sitter-dot (#1770)

* Add tree-sitter-dot

* Fix DOT highlights

* highlights(DOT): add HTML string

* Remove DOT ftdetect

Vim and Neovim runtime have added DOT filetype detection

* Update DOT highlights

queries/dot/highlights.scm

@@ -0,0 +1,45 @@
+(identifier) @type
+(keyword) @keyword
+(string_literal) @string
+(number_literal) @number
+
+[
+  (edgeop)
+  (operator)
+] @operator
+
+[
+  ","
+  ";"
+] @punctuation.delimiter
+
+[
+  "{"
+  "}"
+  "["
+  "]"
+  "<"
+  ">"
+] @punctuation.bracket
+
+(subgraph
+  id: (id
+    (identifier) @namespace)
+)
+
+(attribute
+  name: (id
+    (identifier) @field)
+)
+
+(attribute
+  value: (id
+    (identifier) @constant)
+)
+
+[
+(comment)
+(preproc)
+] @comment
+
+(ERROR) @error

queries/dot/injections.scm

@@ -0,0 +1 @@
+(html_internal) @html