Improve file-search experience

[olizilla]

A user should be able to search for files in their IPFS repo. Web UI would benefit from this.

We should define what search means, as there are a few possible milestones here

• filter by filename in the current directory
• search over all filenames in entire repo
• search for content in files

[hacdias]

@olizilla I think at first we should move towards a modified version of the 2nd option: search over all filenames in the current directory and all subdirectories. The problem I find is that we would need to traverse all directories in a file tree which can be really slow.

Although I wonder to which point would it be possible for IPFS itself to have a files.find function.