feat: steel clippy fmt and contributing guidelines

[heyAyushh]

as nested workspaces aren’t supported in rust, this improves and incorporates

• clippy
• fmt
• steel CLI
• updated Contributing guide

[Perelyn-sama]

I made a to PR steel that would make it possible to create new steel projects with a template that doesn't use multiple workspaces while still maintaining a similar structure to the default steel template

https://github.com/regolith-labs/steel/pull/33

With this, there wouldn't be a need to make changes to the gh actions

[heyAyushh]

I made a to PR steel that would make it possible to create new steel projects with a template that doesn't use multiple workspaces while still maintaining a similar structure to the default steel template

regolith-labs/steel#33

With this, there wouldn't be a need to make changes to the gh actions

I think it's better to keep the workspaces, with steel standard,