Align maniphest show and maniphest search Output

[Timpan4]

Fixes #101

Changes

Core Functionality

• Shared display logic: Extracted ~80 lines of duplicate YAML formatting code into a reusable _format_and_display_tasks() method
• Unified output format: Both maniphest show and maniphest search now produce identical YAML output
• New task_show() method: Uses modern maniphest.search API instead of deprecated maniphest.info for consistency

Command-Line Interface

• Added --show-history flag: Display transition history for columns, priority, and status (both commands)
• Added --show-metadata flag: Display metadata about filter matches (both commands)
• Backward compatibility: --all flag now maps to --show-history for consistency
• Legacy support: --pp flag preserved for users who need the old pretty-print format

Examples

# Before: Inconsistent flags and output formats
$ phabfive maniphest show T123 --all        # Plain text with transitions
$ phabfive maniphest search Project         # YAML format

# After: Consistent flags and output
$ phabfive maniphest show T123              # YAML format (basic)
$ phabfive maniphest show T123 --show-history       # YAML with history
$ phabfive maniphest show T123 --show-metadata      # YAML with metadata
$ phabfive maniphest search Project --show-history  # Same YAML format

# Backward compatibility maintained
$ phabfive maniphest show T123 --all        # YAML with history (same as --show-history)
$ phabfive maniphest show T123 --pp         # Legacy pretty-print format

Sample Output

Both commands now produce identical structured YAML:

- Link: http://phorge.domain.tld/T1
  Task:
    Name: '[EPIC] GUNNAR Gen1 Chip Architecture Design'
    Status: Open
    Priority: High
    Created: '2025-10-01T17:21:53'
    Modified: '2025-10-01T17:21:54'
    Description: |-
      Complete initial architecture design...
  Boards:
    Architecture:
      Column: Backlog
    GUNNAR-Core:
      Column: Backlog
  History:  # Only with --show-history or --all
    Priority:
    - 2025-10-01T17:21:53 [↓] Triage → High
  Metadata:  # Only with --show-metadata
    MatchedBoards: []
    MatchedPriority: false
    MatchedStatus: false

Technical Details

• Zero code duplication: Display logic lives in single _format_and_display_tasks() method
• Consistent API usage: Both commands now use maniphest.search API for modern feature support
• Maintains backward compatibility: Old maniphest.info API still used by --pp flag
• Modular design: Easy to add new display sections (just update shared method)

Benefits

1. Consistent user experience - Same flags and output format across commands
2. Reduced maintenance - Display logic in one place, easier to fix bugs and add features
3. Better structure - YAML output is parseable and more machine-friendly
4. Backward compatible - Existing workflows continue to work with minor format improvements
5. Future-proof - New features (like --show-history) work in both commands automatically

[holmboe]

This LGTM. Personally I am fine with removing the legacy stuff. Up to you to decide before merge. 👍

[Timpan4]

Removed the legacy --pp flag as well. Everything now uses the consistent YAML output format. 👍