Filter packages by tags and features. E.g. Is this package heapless?

[mofosyne]

It would be handy to filter different packages based on if it's using the heap or not.

This could be done by either adding a tag field to clib.json on the maintainer side or by adding tags to https://github.com/clibs/clib/wiki/Packages

Would it also be possible to scan the source code for calls to 'malloc()'? Certainly not a guarantee... but it would allow for adding a 'heap required' tag

[jwerle]

I like that idea!