Add reference images of what these tests are supposed to look like.

Assuming I'm right that is... if I'm wrong, this is merely what they look like in SyncTERM today.

Add reference images of what these tests are supposed to look like.
eac03971 · Deucе · 1910d0af · eac03971 · eac03971 · eac03971
Commit eac03971 authored 3 months ago by Deucе
--- a/src/syncterm/prestest/dhg.png
+++ b/src/syncterm/prestest/dhg.png
--- a/src/syncterm/prestest/engtest-revealed.png
+++ b/src/syncterm/prestest/engtest-revealed.png
--- a/src/syncterm/prestest/engtest.png
+++ b/src/syncterm/prestest/engtest.png
--- a/src/syncterm/prestest/extra-revealed.png
+++ b/src/syncterm/prestest/extra-revealed.png
--- a/src/syncterm/prestest/extra.png
+++ b/src/syncterm/prestest/extra.png