add dotenv singleton

.gitignore

@@ -1,2 +1,3 @@
 # Godot 4+ specific ignores
 .godot/
+.env

Classes/DotEnv.gd

@@ -0,0 +1,22 @@
+extends Node
+
+
+func _init() -> void:
+	var path = ""
+	if OS.has_feature("editor"):
+		path = ProjectSettings.globalize_path("res://.env")
+	else:
+		path = OS.get_executable_path().get_base_dir().path_join(".env")
+
+	if !FileAccess.file_exists(path):
+		return
+
+	var f := FileAccess.open(path, FileAccess.READ)
+	while !f.eof_reached():
+		var line := f.get_line()
+		var split := line.split("=")
+		OS.set_environment(split[0].strip_edges(), split[1].strip_edges())
+
+
+func _ready() -> void:
+	queue_free()