feat: SQL server beta and templates refactoring (#32)

## 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: #32
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>

go.mod

@@ -29,13 +29,22 @@ require (
 
 require (
 	dario.cat/mergo v1.0.1 // indirect
+	github.com/BurntSushi/toml v1.2.1 // indirect
+	github.com/Kunde21/markdownfmt/v3 v3.1.0 // indirect
+	github.com/Masterminds/goutils v1.1.1 // indirect
+	github.com/Masterminds/semver/v3 v3.2.0 // indirect
+	github.com/Masterminds/sprig/v3 v3.2.3 // indirect
 	github.com/ProtonMail/go-crypto v1.3.0 // indirect
 	github.com/agext/levenshtein v1.2.3 // indirect
 	github.com/apparentlymart/go-textseg/v15 v15.0.0 // indirect
+	github.com/armon/go-radix v1.0.0 // indirect
+	github.com/bgentry/speakeasy v0.1.0 // indirect
+	github.com/bmatcuk/doublestar/v4 v4.9.1 // indirect
 	github.com/cloudflare/circl v1.6.2 // indirect
 	github.com/fatih/color v1.18.0 // indirect
 	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
+	github.com/hashicorp/cli v1.1.7 // indirect
 	github.com/hashicorp/errwrap v1.1.0 // indirect
 	github.com/hashicorp/go-checkpoint v0.5.0 // indirect
 	github.com/hashicorp/go-cleanhttp v0.5.2 // indirect
@@ -50,27 +59,38 @@ require (
 	github.com/hashicorp/logutils v1.0.0 // indirect
 	github.com/hashicorp/terraform-exec v0.24.0 // indirect
 	github.com/hashicorp/terraform-json v0.27.2 // indirect
+	github.com/hashicorp/terraform-plugin-docs v0.24.0 // indirect
 	github.com/hashicorp/terraform-plugin-sdk/v2 v2.38.1 // indirect
 	github.com/hashicorp/terraform-registry-address v0.4.0 // indirect
 	github.com/hashicorp/terraform-svchost v0.2.0 // indirect
 	github.com/hashicorp/yamux v0.1.2 // indirect
+	github.com/huandu/xstrings v1.3.3 // indirect
+	github.com/imdario/mergo v0.3.15 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/kr/text v0.2.0 // indirect
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mattn/go-runewidth v0.0.9 // indirect
 	github.com/mitchellh/copystructure v1.2.0 // indirect
 	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
 	github.com/mitchellh/go-wordwrap v1.0.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
 	github.com/mitchellh/reflectwalk v1.0.2 // indirect
 	github.com/oklog/run v1.2.0 // indirect
+	github.com/posener/complete v1.2.3 // indirect
+	github.com/shopspring/decimal v1.3.1 // indirect
+	github.com/spf13/cast v1.5.0 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/stretchr/testify v1.11.1 // indirect
 	github.com/vmihailenco/msgpack v4.0.4+incompatible // indirect
 	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	github.com/yuin/goldmark v1.7.7 // indirect
+	github.com/yuin/goldmark-meta v1.1.0 // indirect
 	github.com/zclconf/go-cty v1.17.0 // indirect
+	go.abhg.dev/goldmark/frontmatter v0.2.0 // indirect
 	golang.org/x/crypto v0.47.0 // indirect
+	golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df // indirect
 	golang.org/x/mod v0.32.0 // indirect
 	golang.org/x/net v0.49.0 // indirect
 	golang.org/x/sync v0.19.0 // indirect
@@ -81,6 +101,7 @@ require (
 	google.golang.org/genproto/googleapis/rpc v0.0.0-20260120221211-b8f7ae30c516 // indirect
 	google.golang.org/grpc v1.78.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 tool golang.org/x/tools/cmd/goimports