* Embedded package build of Element Call
Part of https://github.com/element-hq/element-call/issues/2994
This creates a new "embedded" build (vs "full" build) at the vite level. It will be used by a later PR that actually provides platform specific packages.
Embedded build:
- Uses relative URLs
- Uses relative config.json path and other resource loading
- Has a config.json built in
- Doesn't include the public folder (e.g. favicon)
Out of scope:
- this doesn't attempt to exclude SPA functionality, so technically the build could be used in SPA
- the above means that the crypto-wasm binary is included in the build
* CI artifact name based on type of build
* Update src/config/Config.ts
