v0.19-semantic-kernel

What's Changed

• Clean code. by @hchen2020 in #196
• Fix RichContent pass alway bug. by @hchen2020 in #197
• Add states to chat message result by @hchen2020 in #198
• Fix current agent id. by @hchen2020 in #199
• Add MultiSelectTemplate by @ywang1110 in #200
• Adjust rich content data structure. by @hchen2020 in #201
• Fix rich content text in InstructExecutor. by @hchen2020 in #202
• Add Twilio plugin. by @hchen2020 in #203
• IConversationAttachmentService by @hchen2020 in #204
• Semantic Kernel as LLM provider by @xbotter in #206

Full Changelog: v0.18-llm-planner...v0.19-semantic-kernel