AIP-68 Initial dev tool, boilerplate React plugin component for better DevEx

[bbovenzi]

Let's make it easy for plugin developers to quickly get started by providing them with a boilerplate react plugin project.

• remove the overhead of setting up typescript, core dependencies and build scripts so devs can focus on the functionality of their plugin
• default to use the same chakra component library and theme styles so the plugin easily matches the main UI
• add a new CLI command to create a new plugin

Committer

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

[pierrejeambrun]

That calls for improvement, but we have the initial version for that. Merged in #53365

[pierrejeambrun]

Closing as completed in #53365