## Changes
- Do not modify or edit .gitignore in bundle root.
- Instead create .databricks/.gitignore with content set to "*"
## Why
Merging our changes into existing .gitignore is complicated and adding
.gitignore where it's not expected adds to the noise. Other tools also
use the approach in this PR (e.g. ruff creates .ruff_cache/.gitignore).
## Tests
- Modified templates/default-sql to capture this new file.
## Changes
- Add 'serverless' prompt to default-python template (default is
currently set to "no").
- This is a simplified version of
https://github.com/databricks/cli/pull/2348 with 'auto' functionality
removed.
## Tests
- Split default-python into default-python/classic,
default-python/serverless, default-python/serverless-customcatalog.
- Manually check that "bundle init default-python" with serverless=yes
can be deployed and run on dogfood and test env.