Add test cases for Japanese Kanji and special characters

Co-authored-by: jaccz <9115223+jaccz@users.noreply.github.com>

Author: Copilot

test/japanese_kanji.txt

@@ -0,0 +1,5 @@
+予定日時:Scheduled,NotScheduled
+Foo:Bar,Baz
+
+# Testing Japanese Kanji characters in parameter names and constraints
+if [予定日時] = "Scheduled" then [Foo] = "Bar";

test/special_chars.txt

@@ -0,0 +1,5 @@
+Param:Value1,Value2
+Param2:Val\"1,Val2
+
+# Testing quotes and backslashes in strings
+if [Param] = "Value1" then [Param2] = "Val\"1";