fix: ui flicker and also added a black fade at the start

dialogues/dialogue_manager.gd

@@ -86,6 +86,7 @@ func end_dialogue():
 	
 	is_dialogue_ongoing = false
 	time_between_letters.stop()
+	ui_flicker_timer.stop()
 	
 	dialogue_ended.emit()
 

main.tscn

@@ -55,10 +55,22 @@ tracks/1/keys = {
 "update": 0,
 "values": [Vector2(0, 0)]
 }
+tracks/2/type = "value"
+tracks/2/imported = false
+tracks/2/enabled = true
+tracks/2/path = NodePath("ColorRect:color")
+tracks/2/interp = 1
+tracks/2/loop_wrap = true
+tracks/2/keys = {
+"times": PackedFloat32Array(0),
+"transitions": PackedFloat32Array(1),
+"update": 0,
+"values": [Color(0, 0, 0, 1)]
+}
 
 [sub_resource type="Animation" id="Animation_4c57u"]
 resource_name = "opening_cutscene"
-length = 10.0
+length = 20.0
 tracks/0/type = "value"
 tracks/0/imported = false
 tracks/0/enabled = true
@@ -66,7 +78,7 @@ tracks/0/path = NodePath("ArmoredEnnemy:position")
 tracks/0/interp = 1
 tracks/0/loop_wrap = true
 tracks/0/keys = {
-"times": PackedFloat32Array(6, 8),
+"times": PackedFloat32Array(11.0333, 13.0333),
 "transitions": PackedFloat32Array(1, 1),
 "update": 0,
 "values": [Vector2(-400, 0), Vector2(-271, 0)]
@@ -78,7 +90,7 @@ tracks/1/path = NodePath("ArmoredEnnemy")
 tracks/1/interp = 1
 tracks/1/loop_wrap = true
 tracks/1/keys = {
-"times": PackedFloat32Array(6, 8),
+"times": PackedFloat32Array(11.0333, 13.0333),
 "transitions": PackedFloat32Array(1, 1),
 "values": [{
 "args": [],
@@ -95,7 +107,7 @@ tracks/2/path = NodePath("Player:position")
 tracks/2/interp = 1
 tracks/2/loop_wrap = true
 tracks/2/keys = {
-"times": PackedFloat32Array(0, 1, 2, 3.5, 4.5, 5.5),
+"times": PackedFloat32Array(5.03333, 6.03333, 7.03333, 8.53333, 9.53333, 10.5333),
 "transitions": PackedFloat32Array(1, 1, 1, 1, 1, 1),
 "update": 0,
 "values": [Vector2(0, 0), Vector2(35, 0), Vector2(70, 0), Vector2(70, 0), Vector2(35, 0), Vector2(0, 0)]
@@ -107,7 +119,7 @@ tracks/3/path = NodePath("Player")
 tracks/3/interp = 1
 tracks/3/loop_wrap = true
 tracks/3/keys = {
-"times": PackedFloat32Array(0, 1, 2, 2.96667, 3.5, 4.5, 5.5),
+"times": PackedFloat32Array(5.03333, 6.03333, 7.03333, 8, 8.53333, 9.53333, 10.5333),
 "transitions": PackedFloat32Array(1, 1, 1, 1, 1, 1, 1),
 "values": [{
 "args": [],
@@ -139,7 +151,7 @@ tracks/4/path = NodePath("Player")
 tracks/4/interp = 1
 tracks/4/loop_wrap = true
 tracks/4/keys = {
-"times": PackedFloat32Array(0),
+"times": PackedFloat32Array(5.03333),
 "transitions": PackedFloat32Array(1),
 "values": [{
 "args": [],
@@ -153,13 +165,25 @@ tracks/5/path = NodePath("DialogueManager")
 tracks/5/interp = 1
 tracks/5/loop_wrap = true
 tracks/5/keys = {
-"times": PackedFloat32Array(9),
+"times": PackedFloat32Array(14.0333),
 "transitions": PackedFloat32Array(1),
 "values": [{
 "args": [],
 "method": &"on_dialogue_started"
 }]
 }
+tracks/6/type = "value"
+tracks/6/imported = false
+tracks/6/enabled = true
+tracks/6/path = NodePath("ColorRect:color")
+tracks/6/interp = 1
+tracks/6/loop_wrap = true
+tracks/6/keys = {
+"times": PackedFloat32Array(0, 2, 4),
+"transitions": PackedFloat32Array(1, 1, 1),
+"update": 0,
+"values": [Color(0, 0, 0, 1), Color(0, 0, 0, 1), Color(0, 0, 0, 0)]
+}
 
 [sub_resource type="AnimationLibrary" id="AnimationLibrary_efxa6"]
 _data = {
@@ -310,6 +334,13 @@ stretch_mode = 3
 [node name="ArmoredEnnemy" parent="." instance=ExtResource("9_kek77")]
 position = Vector2(-348, 0)
 
+[node name="ColorRect" type="ColorRect" parent="."]
+offset_left = -322.0
+offset_top = -224.0
+offset_right = 318.0
+offset_bottom = 136.0
+color = Color(0, 0, 0, 1)
+
 [node name="OpeningCutscene" type="AnimationPlayer" parent="."]
 libraries = {
 &"": SubResource("AnimationLibrary_efxa6")