Add ability to store a pointer to some data and then visualize it in the UI

[skrawcz]

Is your feature request related to a problem? Please describe.
Context:

• I am creating tables in the shape of files
• I would like to plot some things about those tables
• my plotting needs are rudimentary, but being able to load the data and poke at it, would help my workflow.

Describe the solution you'd like

• Hamilton Tracker can take pointers to files (it already does this via materializer metadata)
• the Hamilton UI server can then load this file
• the Hamilton UI has a component that can take this data and display it

Describe alternatives you've considered
You could use #1117 instead.

Additional context
This task would be a few things:

1. Paths -- we need some principled way to think about them so that we know where to load a file from.
2. hamilton tracker work -- I don't think there'd be much work, but ensuring paths are captured in a way that make sense.
3. hamilton UI server - figuring out an endpoint that can go get a file from a given path
4. hamilton UI - creating components that can ingest that data and visualize something about it

[zilto]

This could leverage the Store objects introduced with caching in #1104