Update SDK section

[LucJosin]

Description

Update get-sdks script to support a new sdk docs structure.

Doc generators:

• TypeDoc (Typescript)
• JavaDoc (Java)
• GoDoc (Golang)
• DartDoc (Dart)

HawAPI Docs: /docs/sdks/<sdk-name>/sdkdocs/<sdk-specific-generated-doc>/...

E.g (JavaDoc): /docs/sdks/java-sdk/sdkdocs/javadoc/apidocs/...
E.g (TypeDoc): /docs/sdks/java-sdk/sdkdocs/modules/...

.
├── docs
│   ├── README.md
│   └── /sdkdocs
│       ├── ...

• README.md - Markdown documentation with sdk showcase. Integrated with retype generated files
• /sdkdocs - All specific language doc generated files