debug, cleanup and update wasm/js

[rouzwelt]

this is a followup of #966

todo:

• - move shared wasm bindgen helpers into a sep repo to be used across all repos: https://github.com/rainlanguage/rain.wasm
• - remove typeshare in favor of wasm-bindgen and tsify and fix name/type collisions: remove typeshare #1277
• - fix/cleanup redundant/untyped and bloat bindings by using latest wasm-bg attributes that were added in our PR for wasm-bindgen
• - single point of export for all crates in js_api and as result gather all bindings in a single .wasm file and js/ts file, this requires to all js_api folders in rust crates to export them in a standalone crate called js_api
• - expose wasm-bg bindings impls through a feature flag, the wasm-bindgen bindings in rust are still code blocks that a user of the crate can extend/build on top of, so they should still be available in normal rlib builds through feature flags