Optimize clone function

[abelhancock]

Issue:
Currently using the simple one-liner clone function from the figma documentation. It is inefficient, and I suspect it is causing the plugin to run slowly on pages with many frames.

gs-status-annotations/src/code.ts

Lines 141 to 143 in 0988d3c

	function clone(val) {
	return JSON.parse(JSON.stringify(val))
	}

Expected Behavior:
Plugin runs quickly on pages with any number of frames.