Cut down on macro nonsense

- InertAtomic replaced atomic_inert! for improved tooling support
- atomic_defaults! is easier to type out than to explain in a docstring
- Changed rustfmt config to better support tiny functions such as as_any

.github/workflows/rust.yml

@@ -26,4 +26,4 @@ jobs:
     - name: Clippy
       run: cargo clippy
     - name: Formatting
-      run: cargo fmt --check
+      run: cargo fmt +nightly --check