refactor: functions, variable, rule, data sample displays into manifest

[vgkids]

Problem Description

Currently, the display configurations for functions, variables, rules, and data samples are written directly into the contract view. This makes it difficult to navigate the file due to its size, and impossible to re-use the render logic to preview new suggestions.

Proposed Solution

• Create separate components for each display configuration
  • FunctionDisplay
  • VariableDisplay
  • RuleDisplay
  • DataSampleDisplay
• Render these components in the contract view

This will prepare us for a future feature where users can preview AI response before accepting them, as well as add manifest parts manually using the same render.

[vgkids]

Done and merged to spike/ai-rules