chore: create a wrapper task for SDK generation

[ctreatma]

We have the same sequence of Make tasks (clean gen mod ...) duplicated in a lot of places, which makes it hard to keep our CI workflows up-to-date and hard to know what tasks to run for local development.

This creates a generate wrapper task that encapsulates the various code generation steps that we previously ran as separate tasks:

• Code generation
• Moving documentation
• Formatting code

By creating & using this wrapper task, we make it easier to add or remove steps from the SDK generation process without having to update CI.

[github-actions[bot]]

This PR is included in version 0.20.0 :tada: