Add option for compact/quiet MCP tool output

Problem

When MCP tools are invoked, the terminal output is very verbose and visually distracting:

google-calendar - manage-accounts (MCP)(a
                                         ct
                                         io
                                         n:
                                          "
                                         li
                                         st
                                         ")
  ⎿  {                                     
       "accounts": [                       
         {                                 
     … +39 lines (ctrl+o to expand)   

The vertical parameter display and expanded JSON responses take up significant screen real estate and break reading flow.

Proposed Solution

Add a configuration option or flag to control MCP tool output verbosity:

• --quiet-mcp flag or `mcpOutputMode: "compact" setting
• Compact mode could show: ✓ google-calendar.manage-accounts (single line)
• Keep expandable detail available via ctrl+o

Use Case

Users running workflows with multiple MCP calls (e.g., calendar + file operations) would benefit from cleaner output that doesn't interrupt the conversational flow.