Bootstrap Hugo site with PaperMod theme and custom homepage

Sets up the ReGround business site: PaperMod theme (v8.0) as a
submodule, pinned Hugo 0.124.1, and a custom homepage hero
overriding the theme's default blog-first layout with editable
front-matter copy.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "themes/PaperMod"]
+	path = themes/PaperMod
+	url = https://github.com/adityatelange/hugo-PaperMod.git