Create a Binary Ninja explorer plugin

This is already an IDA plugin in https://github.com/mandiant/capa/tree/master/capa/ida. Similarly create a plugin for binja that can be used to explore the capa match. To begin with, only focus on the explorer functionality and ignore the code for creating rules, etc. Also read https://github.com/mandiant/flare-gsoc/blob/2025/doc/project-ideas.md#capa-add-binary-ninja-explorer-plugin for reference