Add tool calling & /v1.0-alpha2 version in quickstarts

[sicoyle]

acceptance criteria:

• each language must showcase tool calling in the latest conversation api updates

languages:

• Update Java Conversation API with Tool Calling support #1213
• Update dotnet Conversation API with Tool Calling support #1212
• Update go Conversation SDK with tool calling and alpha2 APIs #1236
• Update python Conversation HTTP API with Tool Calling support #1211
• Update JS HTTP Conversation API with Tool Calling support #1210
• Update go HTTP Conversation qs with Tool Calling support #1214

[sicoyle]

/assign