Draft: Add render target inputs as a parameter to add_forward_to_graph

[IsseW]

Checklist

• CI Checked:
  • [x] cargo fmt has been ran
  • [x] cargo clippy reports no issues
  • [x] cargo test succeeds
  • [x] cargo rend3-doc has no warnings
  • [ ] cargo deny check issues have been fixed or added to deny.toml
• Manually Checked:
  • [ ] relevant examples/test cases run
  • [ ] changes added to changelog
    • [ ] Add credit to yourself for each change: Added new functionality @githubname.

Related Issues

Description

Adds render targets as a parameter to add_forward_graph, so that you don't have to create bind groups when you want to bind a render target as a texture view.

This could potentially be done a few other ways, this is mostly looking for comments as to if it would be of interest to have something like this.