[REQUEST]: GCC graph dump vizualization

### Is your feature request related to a problem? Please describe

I would like to be able to view the graph visualizations of GCC intermediate representations from pass dumps on CE.

### Describe the solution you'd like

I would like there to be a "view control flow graph" button when viewing a pass dump that opens a pane with the graphviz output of the `.dot` file generated by adding the `-fdump-tree--graph` option (though also for -fdump-rtl-... and similar)

Example graph converted to an SVG below.


### Describe alternatives you've considered

N/A

### Additional context

Not applicable

Start at the pass-dump viewer and trace how GCC tree and RTL dump outputs are exposed. Check how the generated .dot data could be represented alongside the SVG example. Done means a “view control flow graph” control opens a pane for graph output from tree, RTL, and similar pass dumps.

Written by the indexing model from the issue text.