AIP-38 Create new designs for Airflow 3

[pierrejeambrun]

Pages to design:

• New Homepage Dashboard
• DAGs list
• Assets page
• DAG Details

Many table/card view pages should follow the same designs (dag runs list, task instances list, user management, connections)

Committer

• I acknowledge that I am a maintainer/committer of the Apache Airflow project.

[bbovenzi]

Upgrading Cluster Activity to be the main dashboard for a new home page.

Stories:

• What has happened across my entire Airflow deployment recently?
• Can I quickly see any issues and drill down into them?

[bbovenzi]

Card-style view of the DAGs list page.

Users can still toggle to a more condensed table view. A few pieces here are still subject to change.

Stories:

• Show me a list of my dags with a summary of their activity
• We have a big org. I want to filter the list to just the specific dags I care about.
  

[bbovenzi]

Advanced queries for list views:

[bbovenzi]

New vertical navigation with subnav and menu options

[potiuk]

Slick!

[bbovenzi]

DAG Details

Stories:

• Show me an overview of this DAG's activity
• Highlight failed task instances and let me quickly get to their logs

We're going to make that top stats bar smaller and remove "Slow Tasks"