fix: restore human format table display for get and list commands

[dluc]

Summary

Fixes broken human format output in km get and km list commands caused by #1100, which wrapped ContentDto objects in anonymous types that broke HumanOutputFormatter's type checking. This PR restores the table display functionality and improves the human format by:

• Creating a proper ContentDtoWithNode wrapper class instead of using anonymous objects
• Repositioning node field before ID for better visibility
• Simplifying human format output by moving technical details (mimeType, size, dates) to verbose mode only

Before: Human format was broken (displayed as JSON instead of tables)
After: Clean tables showing only essential information: Node, ID, Content, Title, Description, Tags

Changes

• New file: src/Core/Storage/Models/ContentDtoWithNode.cs - Proper wrapper class for content with node information
• Modified: src/Main/CLI/Commands/GetCommand.cs - Uses ContentDtoWithNode.FromContentDto() instead of anonymous object
• Modified: src/Main/CLI/Commands/ListCommand.cs - Uses ContentDtoWithNode.FromContentDto() for list items
• Modified: src/Main/CLI/OutputFormatters/HumanOutputFormatter.cs - Added FormatContentWithNode() and FormatContentWithNodeList() methods

Human Format Display

km get (normal mode):

• Node
• ID
• Content
• Title (if present)
• Description (if present)
• Tags (if present)

km get (verbose mode adds):

• MimeType, Size, ContentCreatedAt, RecordCreatedAt, RecordUpdatedAt, Metadata

km list (normal mode):
| Node | ID | Content Preview |

Test Plan

• All 301 tests pass, 0 skipped
• Code coverage: 80.14% (exceeds 80% threshold)
• Build: 0 warnings, 0 errors
• Formatting: Clean
• Manual testing: km get displays table with node information
• Manual testing: km list displays table with node column
• JSON/YAML formats still include all fields including node

Stats

• Files changed: 5
• Lines added: 179
• Lines removed: 36
• New classes: 1 (ContentDtoWithNode)

Breaking Changes

None - this is a bug fix that restores expected functionality and improves UX