feat: add PO

queries/po/folds.scm

@@ -0,0 +1,9 @@
+[
+  (msgctxt)
+  (msgid)
+  (msgid_plural)
+  (msgstr)
+  (msgstr_plural)
+
+  (message)
+] @fold

queries/po/highlights.scm

@@ -0,0 +1,33 @@
+; 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) @preproc))
+
+; Errors
+
+(ERROR) @error

queries/po/injections.scm

@@ -0,0 +1 @@
+(comment) @comment