Summary:
This sets up a pixie-components subpackage and moves the drawer compoenents
into it.

TODO: Fix styling. It looks like the styles for the drawer components gets overriden
when used by the pixie app. Should we be exporting unstyled components and let the pixie app
call the styling hooks?

TODO: Setup linting for components. The top level eslint + tsconfig doesn't play nicely
with a component with it's own eslint + tsconfig. This linter setup needs some help.

Stories are still in top level pixie to make it easier to debug whether the packaging
is working, to be moved into subcomponents eventually.

Test Plan: Check `yarn storybook` and `yarn dev`

Reviewers: zasgar, michelle, nick, philkuz, #engineering

Reviewed By: michelle, #engineering

JIRA Issues: PP-1680

Differential Revision: https://phab.corp.pixielabs.ai/D6710

GitOrigin-RevId: cc65338599b74809a5d23ccb1cb12145bea63418