feat!: drop modules, general refactor and cleanup

runtime/queries/po/folds.scm

@@ -0,0 +1,8 @@
+[
+  (msgctxt)
+  (msgid)
+  (msgid_plural)
+  (msgstr)
+  (msgstr_plural)
+  (message)
+] @fold

runtime/queries/po/highlights.scm

@@ -0,0 +1,32 @@
+; Keywords
+[
+  "msgctxt"
+  "msgid"
+  "msgid_plural"
+  "msgstr"
+  "msgstr_plural"
+] @keyword
+
+; Punctuation
+[
+  "["
+  "]"
+] @punctuation.bracket
+
+; Literals
+(string) @string
+
+(escape_sequence) @string.escape
+
+(number) @number
+
+; Comments
+(comment) @comment @spell
+
+(comment
+  (reference
+    (text) @string.special.path))
+
+(comment
+  (flag
+    (text) @keyword.directive))

runtime/queries/po/injections.scm

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