Improve and document release / changelog process

We use `changesets` package to automate our release workflow and generate changelog automatically.

Commands to run are documented in .changesets/README.md

It is used in `telescope` and `waterfall` packages both of which are published to NPM and can be used in `telescope-web` when we are going to start publishing it to npm.

We have a few options:
1. disable automated attribution in config.json using `disableThanks: true` and manually add attribution
2. write [our own formatter](https://github.com/changesets/changesets/blob/main/docs/modifying-changelog-format.md) that is smarter than default @changesets/changelog-github which checks [commit author](https://github.com/changesets/changesets/blob/main/packages/get-github-info/src/get-pull-request-info.ts#L45-L51) only
3. configure @changesets/changelog-github to use co-contributors or other additional PR tags on the commit as authors instead of a person doing the comiting. It is either already supported and it is not as dumb as it looks, or we need to contribute this support

Read .changesets/README.md and config.json, then compare the release setup used by the telescope and waterfall packages. Review the linked Changesets formatter and GitHub-info documentation to choose an attribution approach; done means one agreed process is implemented and documented for the listed packages.

Written by the indexing model from the issue text.