chore: import upstream snapshot with attribution

fun_text_processing/text_normalization/zh/verbalizers/char.py

@@ -0,0 +1,14 @@
+from fun_text_processing.text_normalization.zh.graph_utils import FUN_NOT_QUOTE, GraphFst
+from pynini.lib import pynutil
+
+
+class Char(GraphFst):
+    """
+    tokens { char: "你" } -> 你
+    """
+
+    def __init__(self, deterministic: bool = True, lm: bool = False):
+        super().__init__(name="char", kind="verbalize", deterministic=deterministic)
+
+        graph = pynutil.delete('name: "') + FUN_NOT_QUOTE + pynutil.delete('"')
+        self.fst = graph.optimize()