Add Readthedoc feature

.gitattributes

@@ -0,0 +1,2 @@
+# GitHub syntax highlighting
+pixi.lock linguist-language=YAML

.readthedocs.yaml

@@ -0,0 +1,10 @@
+version: "2"
+build:
+  os: "ubuntu-22.04"
+  tools:
+    python: mambaforge-latest
+  commands:
+    - mamba install -c conda-forge -c nodefaults pixi
+    - pixi install
+    - pixi run docnb
+    - pixi run "rm -rf $READTHEDOCS_OUTPUT/html && cp -r docs/_build/html $READTHEDOCS_OUTPUT/html"

docs/conf.py

@@ -15,5 +15,7 @@
     "html_image",
     "smartquotes",
 ]
+nb_execution_show_tb = True
+nb_execution_timeout = -1
 nitpicky = True
 project = "GlueX N-Star"