Add OpenAPI Go and C# (hashicorp#18896)

* Add OpenAPI Go and C#

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Add code sample links for OpenAPI-based Go and .NET

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>

* Remove command flags that are no longer needed

* Fix 'OpenAPI C#' > 'OpenAPI .NET'

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

* Update website/content/docs/get-started/developer-qs.mdx

Co-authored-by: AnPucel <adiroff@hashicorp.com>

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Co-authored-by: Anton Averchenkov <84287187+averche@users.noreply.github.com>
Co-authored-by: AnPucel <adiroff@hashicorp.com>