Add rerun auth commands

[jprochazk]

Adds the ability to authenticate to Redap using the CLI.

• Sibling PR for landing: https://github.com/rerun-io/landing/pull/1067
• Sibling PR for redap: https://github.com/rerun-io/dataplatform/pull/1481

Adds rerun auth login, which implements a login flow based on the OAuth 2.0 Authentication Code flow.

Login flow

1. Run rerun auth login in your terminal, which opens a link in the default browser

$ rerun auth login
⠙ Waiting for browser...

2. User logs in using their browser, which sends them to our login callback

3. The CLI receives credentials from the frontend and stores them locally

⠙ Verifying login...
Success! You are now logged in as [email protected]
Rerun will automatically use the credentials stored on your machine.

There are a few options to ✨ customize the experience:

• --no-open-browser to print a link in the terminal instead of directly opening it in the default browser
• --force to run the login flow even in case valid credentials already exist on the user's machine
• --login-url to change which login page will be opened (useful for testing against login page frontend running on localhost)

To use the token, you can retrieve it using rerun auth token:

REDAP_TOKEN=$(rerun auth token)

NOTE: While testing, use --login-url=https://landing-git-jan-login-page-rerun.vercel.app/login, until the landing PR is merged.

[github-actions]

Latest documentation preview deployed successfully.

Result	Commit	Link
✅	9daa0a5	https://landing-qh95pukkr-rerun.vercel.app/docs

^{Note: This comment is updated whenever you push a commit.}

[github-actions]

Web viewer built successfully. If applicable, you should also test it:

• I have tested the web viewer

Result	Commit	Link	Manifest
✅	d82e6e0	https://rerun.io/viewer/pr/10744	+nightly +main

^{Note: This comment is updated whenever you push a commit.}

[jprochazk]

@rerun-bot full-check

[github-actions]

Started a full build: https://github.com/rerun-io/rerun/actions/runs/16906562004

[andrea-reale]

LGTM. Should we document more the auth commands?

For someone without context it's not necessarily obvious what they are for, I guess.