tree-sitter: Error loading `tree-sitter.{js,wasm}` in browser

Instead of relying on Parser.Language.load() to properly load in .wasm parsers, having an option like https://github.com/ballercat/wasm-loader for webpack users would give a second, battle-hardened approach to begin using tree-sitter on the web.

Needed because I am experiencing an error where Parser.Language.load is looking in the wrong path for my .wasm file. Parser.Language.load("/tree-sitter-javascript.wasm") sends a web request for /tree-sitter.wasm. No fix is applicable.