Plugin system for extensibility

[anitnilay20]

Problem

Different users have different needs for JSON processing, formatting, and analysis that can't all be built into core.

Solution

Create a plugin system:

• Custom data formatters
• Theme plugins
• Export format plugins
• Custom analysis tools
• WebAssembly plugin support

Benefits

• Extensible architecture
• Community contributions
• Specialized use case support
• Modular functionality

Implementation Notes

• Define plugin API and interface
• Consider WebAssembly for cross-language plugins
• Implement plugin discovery and loading
• Add plugin marketplace/registry

Acceptance Criteria

• Plugin API definition
• Plugin loading and lifecycle management
• Example plugins (custom formatter, theme)
• Plugin security and sandboxing
• Plugin documentation and SDK
• Community plugin marketplace