testing + overall architecture refactors

.devcontainer/dimple/devcontainer.json → .devcontainer/devcontainer.json

@@ -1,18 +1,15 @@
 {
   "name": "DIMPLE Python 3.12",
   "image": "mcr.microsoft.com/devcontainers/python:3.12-bookworm",
+  // Installs DIMPLE + dev extras
   "postCreateCommand": "pip install --upgrade pip && pip install -e '.[dev]'",
   "customizations": {
     "vscode": {
       "extensions": [
         "ms-python.python",
         "ms-python.vscode-pylance",
         "ms-toolsai.jupyter"
-      ],
-      "settings": {
-        "python.testing.pytestEnabled": true,
-        "python.testing.pytestArgs": ["tests"]
-      }
+      ]
     }
   },
   "features": {

.gitignore

@@ -1,4 +1,6 @@
 ### Python ###
+.venv/
+
 # Byte-compiled / optimized / DLL files
 __pycache__/
 *.py[cod]
@@ -21,7 +23,9 @@ ipython_config.py
 
 
 ### VisualStudioCode ###
-.vscode/
+# Use `.vscode/*`, NOT `.vscode/`: git never descends into an ignored
+# *directory*, so with `.vscode/` the `!` un-ignore lines below would be dead.
+# `.vscode/*` ignores the contents while still allowing specific files back in.
 .vscode/*
 !.vscode/settings.json
 !.vscode/tasks.json
@@ -36,4 +40,4 @@ ipython_config.py
 # Virtual environments
 .venv/
 venv/
-env/
+env/

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "python.testing.pytestEnabled": true
+}