Restructure for animated gifs

Animated gifs can't go through the asset pipeline since they come out as
a single frame of the original animation. Previously, I had only a
couple of them and didn't have my assets structured very well. I had the
assets that needed to be passthrough copied alongside those that could
go through the pipeline. It wasn't bad since there weren't many
animations. I mapped just those to passthrough copy to go to a single
directory. This will become more fraught as I add more since there's
more opportunity for collisions. When mapping to an output directory, I
can't maintain the inner structure of that directory. The files are
flattened. I moved everything around, both to separate images that can
go through the pipeline from those which can't and to allow for a simple
passthrough copy that will maintain the directory structure so that each
blog post can have its own directory of passthrough copied animated gifs
in the build.

images/blog/outsourcing-my-memory-to-gum/script-discovery.tape

@@ -0,0 +1,13 @@
+# Run `vhs` from project root to get the correct output
+Output assets/images/blog/outsourcing-my-memory-to-gum/script-discovery.gif
+
+Set Shell "bash"
+Set FontSize 32
+Set Width 1100
+Set Height 900
+
+Type "npm run" Sleep 500ms  Enter
+Sleep 4s
+
+Type "npm run start"
+Sleep 3s