alpheus: move into its own directory
Assisted-by: Claude Opus 5.5 via Claude Code
diff --git a/.gitignore b/alpheus/.gitignore
similarity index 100%
rename from .gitignore
rename to alpheus/.gitignore
diff --git a/README.md b/alpheus/README.md
similarity index 100%
rename from README.md
rename to alpheus/README.md
diff --git a/layout.yml b/alpheus/layout.yml
similarity index 100%
rename from layout.yml
rename to alpheus/layout.yml
diff --git a/plankeus.scad b/alpheus/plankeus.scad
similarity index 100%
rename from plankeus.scad
rename to alpheus/plankeus.scad