Small features (#415)

This PR is a compilation of small improvements

 - Lock bindgen version for `icicle-cuda-runtime`
- Add an error message when trying to build on Mac (or any non
windows/linux machine)
 - Add documentation and template files for adding new curve
 - Add documentation on _params.cuh contents
- Add the script to bump all the rust crates versions to the same
version

Resolves #313

.github/workflows/rust.yml

@@ -33,7 +33,7 @@ jobs:
       # before building the project.
       # e.g. icicle-cuda-runtime/src/bindings.rs is generated and icicle-cuda-runtime/src/lib.rs includes that module
       # causing rustfmt to fail.
-      run: if [[ $(find . -name target -prune -o -iname *.rs -print | xargs cargo fmt --check --) ]]; then echo "Please run cargo fmt"; exit 1; fi
+      run: if [[ $(find . -path ./icicle-curves/icicle-curve-template -prune -o -name target -prune -o -iname *.rs -print | xargs cargo fmt --check --) ]]; then echo "Please run cargo fmt"; exit 1; fi
 
   build-linux:
     name: Build on Linux