Refactor table rendering to use consistent console.RenderTable formatting

[Copilot]

The GitHub CLI extension gh-aw was using manual table formatting with fixed-width columns and manual separators in its CLI commands, which looked inconsistent compared to GitHub CLI's professional appearance. This PR refactors the table rendering to use the existing console.RenderTable system that provides GitHub CLI-style formatting with TTY-aware styling, dynamic column sizing, and professional headers.

Changes Made

Before (Manual formatting)

ID              Display Name         Status       MCP      HTTP Transport
--              ------------         ------       ---      -------------
claude          Claude Code          Stable       Yes      Yes         
codex           Codex                Experimental Yes      No          

After (Professional table rendering)

Available Agentic Engines
                         
ID     | Display Name | Status       | MCP | HTTP Transport
------ | ------------ | ------------ | --- | --------------
claude | Claude Code  | Stable       | Yes | Yes           
codex  | Codex        | Experimental | Yes | No            

Technical Implementation

1. Replaced manual table formatting in listAgenticEngines function (lines 160-164) that used fixed-width printf statements with console.TableConfig structure
2. Replaced manual table formatting in StatusWorkflows function (lines 1102-1103) with similar professional rendering
3. Maintained all existing functionality including verbose/non-verbose modes and all status information
4. Applied consistent styling with TTY-aware colors, dynamic column sizing, and professional separators

The implementation uses the existing console.RenderTable function with TableConfig that includes:

• Dynamic column width calculation based on content
• Professional header styling with TTY detection
• Consistent formatting across all CLI commands
• Better visual alignment and readability

Testing

• All existing tests continue to pass
• Added new tests for verbose table rendering functionality
• Manual testing confirms visual consistency with GitHub CLI commands like gh run list
• Code formatting and linting validation complete

The table rendering now provides a professional appearance consistent with GitHub CLI standards while preserving all existing functionality.

Fixes #91.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• api.contoso.com
  • Triggering command: /tmp/go-build3083132726/b270/cli.test -test.testlogfile=/tmp/go-build3083132726/b270/testlog.txt -test.paniconexit0 -test.timeout=10m0s -test.v=true (dns block)
  • Triggering command: /tmp/go-build2112566358/b270/cli.test -test.testlogfile=/tmp/go-build2112566358/b270/testlog.txt -test.paniconexit0 -test.timeout=10m0s -test.v=true (dns block)
  • Triggering command: /tmp/go-build446760869/b001/cli.test -test.testlogfile=/tmp/go-build446760869/b001/testlog.txt -test.paniconexit0 -test.timeout=10m0s -test.v=true (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

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