feat!: drop modules, general refactor and cleanup

runtime/queries/requirements/highlights.scm

@@ -0,0 +1,52 @@
+; packages
+(package) @variable
+
+(extras
+  (package) @variable.parameter)
+
+(path) @string.special.path
+
+(url) @string.special.url
+
+; versions
+(version_cmp) @operator
+
+(version) @number
+
+; markers
+(marker_var) @attribute
+
+(marker_op) @keyword.operator
+
+; options
+(option) @function
+
+"=" @operator
+
+; punctuation
+[
+  "["
+  "]"
+  "("
+  ")"
+] @punctuation.bracket
+
+[
+  ","
+  ";"
+  "@"
+] @punctuation.delimiter
+
+[
+  "${"
+  "}"
+] @punctuation.special
+
+; misc
+(env_var) @constant
+
+(quoted_string) @string
+
+(linebreak) @character.special
+
+(comment) @comment @spell

runtime/queries/requirements/injections.scm

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