## Changes
* Autogenerate BundleSchema.d.ts file (from `databricks bundle schema`
command) to provide typing for the parsed bundle object.
* Add a watcher for all DABs configuration files
* Add BundleFileSet object, to handle operations on the full bundle file
tree.
* Used these to add autocompletion for all files included in the root
bundle.yaml.

**NOTE:** This PR currently parses yamls in code. We want to move that
to databricks CLI. The implementation can is modular and can be swapped
with the CLI calls once we have those features in the CLI.

## Tests
* Unit tests
* Manual

## Changes
* Fixes a big in
#892, which caused
the bundle autocomplete to not recognise a new file.
* Bundle autocomplete now updates monitored files when
  * there is a change to the bundle root
  * a bundle file is created
  * a bundle file is deleted


## Tests
* manual

## Changes
* Adds
* `BundleConfigReaderWriter`: Manages reading and writing configs
to/from the `BundleFileSet`
* `ConfigOverrideReaderWriter`: Manages reading and writing configs
to/from the `StateStorage`
* `ConfigModel`: Provides a centralised view of the configs after
applying any overrides. This is the single source of truth for all
features that require reading/writing these configs.


## Tests
<!-- How is this tested? -->

…is deleted (#931)

## Changes
Fixes
#922 (comment)
## Tests
<!-- How is this tested? -->