cvm-rs: version 0.2.0

- switch to napi-rs. this mostly affects only the backend side of things, but IMO napi-rs is better (also, way less boilerplate is needed compared to neon).

- jpeg encoding no longer clones the input buffer internally (or wraps it in a Mutex as well), thanks to napi-rs not sucking in this regard. this is *probably* a micro-optimization, but will make it easier to later on do parallel encoding of all rectangles

- guac encoding is weird. This is kind of a painpoint of napi-rs but it's bearable

cvm-rs/index.js

@@ -2,5 +2,11 @@
 import { createRequire } from 'module';
 const require = createRequire(import.meta.url);
 
-export let {guacDecode, guacEncode, jpegEncode} = require('./index.node');
+let {guacDecode, guacEncodeImpl, jpegEncode} = require('./index.node');
 
+export { guacDecode, jpegEncode };
+
+// shim for js->rust interop, because napi-rs kind of blows in this regard
+export function guacEncode(...args) {
+	return guacEncodeImpl(args);
+}