Use vite for bundling

[Egge21M]

Description

This PR adds vite for bundling and transpiling this library. Vite has become an industry standard, using rollup and esbuild under the hood. tsc is still kept, but only used for type checking and declarations. It also adds a standalone build that is made availabel through jsdelivr.

The PR also changes the build targets to ES2020 (from lowest ES5) and changes some of the export structure. While technically a breaking change, this should not affect downstream, as exports / imports are usually handled by the package manager / bundler.

Changes

• Added vite and config
• Changed build commands to use vite
• Removed es5 target
• Added standalone build

PR Tasks

• Open PR
• run npm run test --> no failing unit tests
• run npm run format

[gudnuf]

have you looked at vite library mode. Its probably overkill, but would allow us to create a demo wallet alongside the lib
/src would be the cashu-ts library
/demo would be a demo wallet that imports directly from /src

[Egge21M]

have you looked at vite library mode. Its probably overkill, but would allow us to create a demo wallet alongside the lib /src would be the cashu-ts library /demo would be a demo wallet that imports directly from /src

Yes, good idea. This PR actually introduces library mode. I think all the is required to make a dev env work, would be to add a index.html file and reference the lib's index file in there.

Building a simple wallet interface or at least some buttons to test the public API against a local test mint is a good idea IMHO. I also do not think its overkill. It also allows implementers to use their browser as a sort of scratch pad for testing without having to write a test file.

However I think this should be introduced in a separate PR. Where you able to include this PRs output in your projects without any bundling issues @gudnuf ?