added firebase and rudimentary leaderboard support

addons/godot-firebase/storage/storage_task.gd

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+## @meta-authors SIsilicon, Kyle 'backat50ft' Szklenski
+## @meta-version 2.2
+## An object that keeps track of an operation performed by [StorageReference].
+@tool
+class_name StorageTask
+extends RefCounted
+
+enum Task {
+	TASK_UPLOAD,
+	TASK_UPLOAD_META,
+	TASK_DOWNLOAD,
+	TASK_DOWNLOAD_META,
+	TASK_DOWNLOAD_URL,
+	TASK_LIST,
+	TASK_LIST_ALL,
+	TASK_DELETE,
+	TASK_MAX ## The number of [enum Task] constants.
+}
+
+## Emitted when the task is finished. Returns data depending checked the success and action of the task.
+signal task_finished(data)
+
+## Boolean to determine if this request involves metadata only
+var is_meta : bool
+
+## @enum Task
+## @default -1
+## @setter set_action
+## The kind of operation this [StorageTask] is keeping track of.
+var action : int = -1 : set = set_action
+
+var ref # Should not be needed, damnit
+
+## @default PackedByteArray()
+## Data that the tracked task will/has returned.
+var data = PackedByteArray() # data can be of any type.
+
+## @default 0.0
+## The percentage of data that has been received.
+var progress : float = 0.0
+
+## @default -1
+## @enum HTTPRequest.Result
+## The resulting status of the task. Anyting other than [constant HTTPRequest.RESULT_SUCCESS] means an error has occured.
+var result : int = -1
+
+## @default false
+## Whether the task is finished processing.
+var finished : bool = false
+
+## @default PackedStringArray()
+## The returned HTTP response headers.
+var response_headers := PackedStringArray()
+
+## @default 0
+## @enum HTTPClient.ResponseCode
+## The returned HTTP response code.
+var response_code : int = 0
+
+var _method : int = -1
+var _url : String = ""
+var _headers : PackedStringArray = PackedStringArray()
+
+func set_action(value : int) -> void:
+	action = value
+	match action:
+		Task.TASK_UPLOAD:
+			_method = HTTPClient.METHOD_POST
+		Task.TASK_UPLOAD_META:
+			_method = HTTPClient.METHOD_PATCH
+		Task.TASK_DELETE:
+			_method = HTTPClient.METHOD_DELETE
+		_:
+			_method = HTTPClient.METHOD_GET