Add initial basic version of MI Copilot agent mode

[IsuruMaduranga]

Purpose

This PR adds the intial working version of MI Copilot Agent Moode. This will act as the base for further development.

Fixes wso2/mi-vscode#1367

[coderabbitai]

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[Copilot]

Pull request overview

This PR introduces the initial working version of MI Copilot Agent Mode, representing a significant architectural shift from the previous question-suggestion based approach to an agent-based interaction model with tool calling capabilities. The changes include:

• Major refactoring: renamed ai-panel → ai-features to better organize existing AI functionality
• New agent-mode module implementing agent-based interactions with streaming tool execution
• Removal of the suggestion/question generation system in favor of direct agent interaction
• Addition of ToolCallSegment component to visualize agent tool usage in the UI
• Split RPC clients: MiAiPanelRpcClient for AI features and MiAgentPanelRpcClient for agent mode

Reviewed changes

Copilot reviewed 44 out of 86 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
workspaces/mi/mi-visualizer/src/views/AIPanel/utils.ts	Added ContentSegment interface and enhanced splitContent() to parse <toolcall> tags with loading states
workspaces/mi/mi-visualizer/src/views/AIPanel/component/ToolCallSegment.tsx	New component to display tool calls with loading/success/failure states
workspaces/mi/mi-visualizer/src/views/AIPanel/component/MICopilotContext.tsx	Removed questions/suggestions state management
workspaces/mi/mi-visualizer/src/views/AIPanel/component/AIChatMessage.tsx	Added rendering logic for tool call segments
workspaces/mi/mi-visualizer/src/views/AIPanel/component/AIChatFooter.tsx	Replaced code generation logic with agent event handling, removed suggestions UI
workspaces/mi/mi-visualizer/src/Visualizer.tsx	Added "agent" mode support
workspaces/mi/mi-rpc-client/src/rpc-clients/ai-features/*	Split AI features into separate RPC client
workspaces/mi/mi-rpc-client/src/rpc-clients/agent-mode/*	New RPC client for agent mode operations
workspaces/mi/mi-rpc-client/src/RpcClient.ts	Added agent panel RPC client and event listener
workspaces/mi/mi-extension/src/ai-features/*	Renamed from ai-panel to better reflect purpose
workspaces/mi/mi-extension/src/rpc-managers/agent-mode/*	New RPC manager for agent operations with event streaming
workspaces/mi/mi-extension/src/constants/index.ts	Added OPEN_AGENT_PANEL command

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[Copilot]

Unused variable response.

[Copilot]

This write to property 'projectUri' is useless, since another property write always overrides it.