update forge deployment workflow with nonce and gas management

### Problem

the deployment experience via forge is not well documented, particularly regarding nonce issues and gas estimation. Developers must use non-obvious flags like "--slow" and manually adjust gas settings.

developers face a painful multi-hour process of trial and error with various gas and nonce flags to successfully deploy multiple contracts.

### Solution
create (or update) a step-by-step guide in the deployment documentation that covers:

- [ ] when and why to use the “--slow” flag
- [ ] how gas estimation works and how to manually override it
- [ ] recommendations for handling nonce issues