feat!: drop modules, general refactor and cleanup

runtime/queries/gitcommit/highlights.scm

@@ -0,0 +1,33 @@
+(comment) @comment
+(generated_comment) @comment
+(title) @text.title
+(text) @text
+(branch) @text.reference
+(change) @keyword
+(filepath) @text.uri
+(arrow) @punctuation.delimiter
+
+(subject) @text.title @spell
+(subject (overflow) @text @spell)
+(prefix (type) @keyword @nospell)
+(prefix (scope) @parameter @nospell)
+(prefix [
+    "("
+    ")"
+    ":"
+] @punctuation.delimiter)
+(prefix [
+    "!"
+] @punctuation.special)
+
+(message) @text @spell
+
+(trailer (token) @label)
+(trailer (value) @text)
+
+(breaking_change (token) @text.warning)
+(breaking_change (value) @text @spell)
+
+(scissor) @comment
+
+(ERROR) @error