Implemented additional audio for mirror from Maggie; fixed shader flash

on damage from hitting glass shards.

sounds/MIRROR_SHATTER.wav.import

@@ -0,0 +1,24 @@
+[remap]
+
+importer="wav"
+type="AudioStreamWAV"
+uid="uid://cs4pq5u144agp"
+path="res://.godot/imported/MIRROR_SHATTER.wav-6a9b05ad677ea7d6108bac87600f3937.sample"
+
+[deps]
+
+source_file="res://sounds/MIRROR_SHATTER.wav"
+dest_files=["res://.godot/imported/MIRROR_SHATTER.wav-6a9b05ad677ea7d6108bac87600f3937.sample"]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=2