Add helix theme; lean up neovim; add emacs .minimal-emacs config; update .gitignore

neovim/dot-config/nvim/lazyvim.json

@@ -0,0 +1,15 @@
+{
+  "extras": [
+    "lazyvim.plugins.extras.ai.copilot",
+    "lazyvim.plugins.extras.coding.mini-surround",
+    "lazyvim.plugins.extras.lang.cmake",
+    "lazyvim.plugins.extras.lang.json",
+    "lazyvim.plugins.extras.util.dot",
+    "lazyvim.plugins.extras.util.mini-hipatterns"
+  ],
+  "install_version": 7,
+  "news": {
+    "NEWS.md": "11866"
+  },
+  "version": 8
+}