feat: auto generated files and new structure (#4)

## Description

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At least please give us some description what you are trying to achieve and why your change is needed. -->

relates to #1234

## Checklist

- [ ] Issue was linked above
- [ ] Code format was applied: `make fmt`
- [ ] Examples were added / adjusted (see `examples/` directory)
- [x] Docs are up-to-date: `make generate-docs` (will be checked by CI)
- [ ] Unit tests got implemented or updated
- [ ] Acceptance tests got implemented or updated (see e.g. [here](f5f99d1709/stackit/internal/services/dns/dns_acc_test.go))
- [x] Unit tests are passing: `make test` (will be checked by CI)
- [x] No linter issues: `make lint` (will be checked by CI)

Reviewed-on: #4
Reviewed-by: Andre_Harms <andre.harms@stackit.cloud>
Co-authored-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>
Co-committed-by: Marcel S. Henselin <marcel.henselin@stackit.cloud>

pkg/certificatesbeta/configuration.go

@@ -0,0 +1,38 @@
+/*
+STACKIT Application Load Balancer Certificates API
+
+### DEPRECATED! This API offers the ability to store TLS certificates, which can be used by load balancing servers in STACKIT. They can be between consumer and load balancing server and/or between load balancing server and endpoint server.
+
+API version: 2beta.0.0
+*/
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package certificatesbeta
+
+import (
+	"github.com/stackitcloud/stackit-sdk-go/core/config"
+)
+
+// NewConfiguration returns a new Configuration object
+func NewConfiguration() *config.Configuration {
+	cfg := &config.Configuration{
+		DefaultHeader: make(map[string]string),
+		UserAgent:     "stackit-sdk-go/certificatesbeta",
+		Debug:         false,
+		Servers: config.ServerConfigurations{
+			{
+				URL:         "https://certificates.api.stackit.cloud",
+				Description: "No description provided",
+				Variables: map[string]config.ServerVariable{
+					"region": {
+						Description:  "No description provided",
+						DefaultValue: "global",
+					},
+				},
+			},
+		},
+		OperationServers: map[string]config.ServerConfigurations{},
+	}
+	return cfg
+}