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

**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