feat: add metadata to GET tools route

[cpacker]

This PR adds a metadata tag to the GET tools route so that the chat UI can highlight core MemGPT functions (vs other functions) without having to rely on hardcoded string matching.

Please describe the purpose of this pull request.

• add a metadata tags field to the tool model, return tags memgpt-base and memgpt-extras on the batteries-included functions so that it can be reflected in the chat ui
• rename API function to 'list all tools' instead of 'list tools'

How to test

GET /tools route now provides a metadata tag (empty if not from base or extras modules):

{
	"tools": [
		{
			"name": "append_to_text_file",
			"json_schema": {
				"name": "append_to_text_file",
				"description": "Append to a text file.",
				"parameters": {
					"type": "object",
					"properties": {
						"filename": {
							"type": "string",
							"description": "The name of the file to append to."
						},
						"content": {
							"type": "string",
							"description": "Content to append to the file."
						},
						"request_heartbeat": {
							"type": "boolean",
							"description": "Request an immediate heartbeat after function execution. Set to 'true' if you want to send a follow-up message or run a follow-up function."
						}
					},
					"required": [
						"filename",
						"content",
						"request_heartbeat"
					]
				}
			},
			"tags": [
				"memgpt-extras"
			],
			"source_type": "python",
			"source_code": "def append_to_text_file(self, filename: str, content: str):\n    \"\"\"\n    Append to a text file.\n\n    Args:\n        filename (str): The name of the file to append to.\n        content (str): Content to append to the file.\n\n    Returns:\n        Optional[str]: None is always returned as this function does not produce a response.\n    \"\"\"\n    if not os.path.exists(filename):\n        raise FileNotFoundError(f\"The file '{filename}' does not exist.\")\n\n    with open(filename, \"a\", encoding=\"utf-8\") as file:\n        file.write(content + \"\\n\")\n"
		},