Approach to linting, lsp, and fmt

[yorinasub17]

Initially, rely solely on existing typescript ecosystem. Better to use typescript approach since plan is to include support for node_modules instead of deno approach.

Note that this has a disadvantage where the typescript lsp will expose things that we don't support, such as fetch. We'll need to investigate if there is a way to omit some functions (adding is easy, as we can create an npm package containing senc types).