Alpha (#4)

* chore: initial push to be able to work together

* chore: add missing wait folder

* chore: add missing folders

* chore: cleanup alpha branch

* feat: mssql alpha instance (#2)

* fix: remove unused attribute types and functions from backup models

* fix: update API client references to use sqlserverflexalpha package

* fix: update package references to use sqlserverflexalpha and modify user data source model

* fix: add sqlserverflexalpha user data source to provider

* fix: add sqlserverflexalpha user resource and update related functionality

* chore: add stackit_sqlserverflexalpha_user resource and instance_id variable

* fix: refactor sqlserverflexalpha user resource and enhance schema with status and default_database

---------

Co-authored-by: Andre Harms <andre.harms@stackit.cloud>
Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>

* feat: add sqlserver instance

* chore: fixing tests

* chore: update docs

---------

Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Co-authored-by: Andre Harms <andre.harms@stackit.cloud>

sample/sample.tfrc.example

@@ -0,0 +1,10 @@
+provider_installation {
+   dev_overrides {
+      "registry.terraform.io/stackitcloud/stackitalpha" = "<CURRENT PROJECT PATH>/bin/"
+   }
+
+   # For all other providers, install them directly from their origin provider
+   # registries as normal. If you omit this, Terraform will _only_ use
+   # the dev_overrides block, and so no other providers will be available.
+   direct {}
+}