feat(examples): add Claude memory plugin example for OpenViking

[Mijamind719]

• feat(examples): add a practical Claude memory plugin example

Introduce examples/claude-memory-plugin to show how Claude Code hooks can be wired to OpenViking session APIs for memory lifecycle management.

What this commit mainly does:

• Adds an end-to-end plugin example (hooks, helper script, plugin manifest, and memory-recall skill)
• Connects Claude session events to OpenViking session create/ingest/commit flow
• Provides runnable docs so users can copy the pattern into real projects

Design principles:

• Keep plugin integration minimal and event-driven, aligned with Claude hook model
• Support dual-mode operation (local/http) with automatic switching from config
• Prioritize reliability and reproducibility through a deterministic real-session E2E runner
• Keep this as an example implementation under examples/, not invasive core changes

Description

Related Issue

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update
• Refactoring (no functional changes)
• Performance improvement
• Test update

Changes Made

Testing

• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have tested this on the following platforms:
  • Linux
  • macOS
  • Windows

Checklist

• My code follows the project's coding style
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• Any dependent changes have been merged and published

Screenshots (if applicable)

Additional Notes

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