Move UI components out of agoric-sdk

[turadg]

What is the Problem Being Solved?

UI development has different tooling and release requirements than the rest of agoric-sdk. https://github.com/Agoric/wallet-app/ was removed in #6511

There remains ui-components and web-components which weren't moved at the time because they need tooling to publish to NPM. agoric-sdk has all that built in but moving them out will require setting that up in another repo.

Related issues: #2320

Description of the Design

Start a new repo for client code that is used in UIs. No changes could break anything server-side so it would have much faster testing.

Migrate these packages to it,

• @agoric/ui-components
• @agoric/web-components

does it include CLI as well as GUI?

• @agoric/agoric-cli

DECISION: no, that's too useful rn to agoric-sdk testing.

Security Considerations

Test Plan

New repo is https://github.com/Agoric/ui-kit

Tasks

Preview Give feedback

1. new repo has CI running tests
2. new repo has CI running lint (eslint and types)
3. new repo has MAINTAINERS.md with how to publish to NPM
4. new repo has commit history for ui-components and web-components

[turadg]

For prioritization, example of PR bumping from merge queue due to flaky test for web-components: https://github.com/Agoric/agoric-sdk/actions/runs/5216063114/jobs/9414454901