style: apply rustfmt across all crates and demos

Consistent formatting pass: line wrapping, import sorting, trailing
whitespace removal, let-chain indentation, merged derive attributes,
and unsafe block reformatting.

Co-Authored-By: Claude Opus 4.6 (1M context) <[email protected]>

demos/rtx-alphafold-demo/src/evoformer.rs

@@ -33,7 +33,7 @@ impl Default for EvoformerBlock {
 
 impl EvoformerBlock {
     /// Create a new Evoformer block.
-    #[must_use] 
+    #[must_use]
     pub fn new(num_heads: usize) -> Self {
         use rand::SeedableRng;
         use rand_distr::{Distribution, Normal};
@@ -176,7 +176,7 @@ pub struct Evoformer {
 
 impl Evoformer {
     /// Create a new Evoformer with specified number of blocks.
-    #[must_use] 
+    #[must_use]
     pub fn new(num_blocks: usize) -> Self {
         let blocks = (0..num_blocks).map(|_| EvoformerBlock::default()).collect();
         Self { blocks }