Provide YAML schema for `tesseract_config.yaml`

[dionhaefner]

Summary

We could add a YAML Schema that allows IDEs to validate tesseract_config.yaml and provide inline help.

Why is this needed?

Less looking up stuff in the docs, less friction when creating Tesseracts.

Usage example

$schema: https://raw.githubusercontent.com/pasteurlabs/tesseract-core/refs/tags/v1.3.0/schemas/config-schema.yaml

general: "kenobi"  # IDE says no