Define Netlify CI variables in netlify.toml (#1194)

Signed-off-by: yubiuser <[email protected]>

Author: yubiuser

netlify.toml

@@ -0,0 +1,11 @@
+[build]
+base = "/"
+publish = "site/"
+command = "mkdocs build --clean --strict"
+
+[build.environment]
+    PYTHON_VERSION = "3.11"
+    NODE_VERSION = "22"
+    CI = "true"
+    DISABLE_OPENCOLLECTIVE = "true"
+    OPENCOLLECTIVE_HIDE = "true"