feat(render): support source_id and source_name in menu render

[tim3nd]

allow blink to show source related info in completion menu

example (LSP and Snippets are item's source_name):

related config from example

		---@module 'blink.cmp'
		opts = {
				menu = {
					draw = {
						columns = {
							{ "label", "label_description", gap = 1 },
							{ "kind_icon", "kind", gap = 1 },
							{ "source_name" },
						},
					},
				},
			},
		},

source_name has been added as one of default config components for demonstration, but I'm not sure if it's appropriate.

[Saghen]

Thanks! source_name seems like a good default for most users

[tim3nd]

Sorry to bother, but I think there is a typo in readme.