Add documentation placeholders for supported languages (smithy-lang#2534)

Author: hpmellema

docs/source-2.0/index.rst

@@ -150,13 +150,18 @@ Read more
     tutorials/index
     Additional specs <additional-specs/index>
     aws/index
-    ts-ssdk/index
 
 .. toctree::
     :caption: Languages
     :maxdepth: 1
 
-    java/index
+    languages/java/index
+    languages/typescript/index
+    languages/rust/index
+    languages/python/index
+    languages/kotlin/index
+    languages/golang/index
+    languages/scala/index
 
 .. toctree::
     :caption: Project

docs/source-2.0/languages/golang/index.rst

@@ -0,0 +1,13 @@
+======
+GoLang
+======
+
+.. warning::
+
+       Smithy Go is currently in development and documentation is under construction
+
+.. toctree::
+    :caption: References
+    :maxdepth: 1
+
+    Source code <https://github.com/aws/smithy-go>

docs/source-2.0/java/client/codegen-integrations.rst renamed to docs/source-2.0/languages/java/client/codegen-integrations.rst

@@ -9,7 +9,7 @@ and can be executed with `Gradle <https://gradle.org/>`_ (recommended) or the :r
     :class: note
 
     The Smithy CLI is a prerequisite for this guide.
-    See the :doc:`Smithy CLI installation guide <../../guides/smithy-cli/cli_installation>`
+    See the :doc:`Smithy CLI installation guide </guides/smithy-cli/cli_installation>`
     if you do not already have the CLI installed.
 
 -----------------------------------

docs/source-2.0/java/client/configuration.rst renamed to docs/source-2.0/languages/java/client/configuration.rst

@@ -9,7 +9,7 @@ Java clients from a Smithy model of a service.
 
     Smithy Java is currently in Developer Preview. All interfaces are subject to change.
 
-For a general overview of the Smithy IDL, see the Smithy :doc:`../../quickstart` Guide
+For a general overview of the Smithy IDL, see the Smithy :doc:`/quickstart` Guide
 
 For a general introduction the the Smithy Java framework, see the Smithy :doc:`../quickstart` Guide.