docs: Embedded sdk

[jpchev]

SUMMARY

prerequisites for embedded dashboards, how to set up and generate a token with the secret.

[rusackas]

Thanks! Running CI 🤞

[rusackas]

Looks like you need to run the pre-commit hook.
Superset uses Git pre-commit hooks courtesy of pre-commit. To install run the following:

pip3 install -r requirements/development.txt
pre-commit install
A series of checks will now run when you make a git commit.

Alternatively it is possible to run pre-commit by running pre-commit manually:

pre-commit run --all-files

[jpchev]

@rusackas I've fixed the trailing whitespaces