Feat: alpha sqlserver user (#12)

* 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

* chore: remove not needed service files

* chore: cleanup import in utils

* fix: provider name change

* fix: clone missing doc files

* fix: docs adjustments

* fix: docs CI scripts

* fix: docs naming

* fix: remove guides from docs

* fix: adjust examples

* fix: remove obsolete doc templates

* fix: docs adjustments

* fix: add missing doc file

* fix: temp rename file

---------

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

.github/docs/contribution-guide/resource.go

@@ -1,3 +1,5 @@
+// Copyright (c) STACKIT
+
 package foo
 
 import (

.github/docs/contribution-guide/utils/util.go

@@ -1,3 +1,5 @@
+// Copyright (c) STACKIT
+
 package utils
 
 import (

.github/workflows/ci.yaml

@@ -8,7 +8,7 @@ on:
       - main
 
 env:
-  GO_VERSION: "1.24"
+  GO_VERSION: "1.25"
   CODE_COVERAGE_FILE_NAME: "coverage.out" # must be the same as in Makefile
   CODE_COVERAGE_ARTIFACT_NAME: "code-coverage"