[code-reflection] Integrated: Add SSA id dependency viewer tool + DotViewer infra

[Gary Frost]

On Sat, 2 Aug 2025 12:47:21 GMT, Gary Frost <gfrost at openjdk.org> wrote:

> Another HAT tool that I needed to find a home for. 
> 
> This one shows a dependency graph between the SSA id (refs to defs) for a given Babylon funcOp graph.
> 
> This is essentially a DOT graph view of the dependencies shown in the existing line based FuncOpViewer tool

This pull request has now been integrated.

Changeset: 32671792
Author:    Gary Frost <gfrost at openjdk.org>
URL:       https://git.openjdk.org/babylon/commit/326717927244f691793cb11ffb2027c0175910a0
Stats:     3346 lines in 25 files changed: 3259 ins; 42 del; 45 mod

Add SSA id dependency viewer tool + DotViewer infra

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PR: https://git.openjdk.org/babylon/pull/511