[Improvement] Add more details to PluginMetadata

[dlim-circle]

• For plugin metadata, should we add a new field category ? Thinking of plugins like phone apps in app store, where plugins can be categorized and developers can leverage this information to build product experiences off it
• There might be other information we would like for the metadata, curious if there are other needs the community has came across

[jaypaik]

Related to plugin metadata updates: https://github.com/erc6900/resources/issues/21