feat(cli): Improve UX for key commands with better help, about, and usage examples

[MozirDmitriy]

Motivation

The current CLI commands (forge create, forge verify-contract, cast send, cast call) lack detailed help messages, usage examples, and clear argument descriptions. This can make it difficult for both new and experienced users to understand the full capabilities and correct usage of these commands. Improving the UX of the CLI will make Foundry more approachable and user-friendly.

Solution

• Added or improved about and long_about descriptions for the most important CLI commands.
• Enhanced help messages for all key arguments and flags, making them more descriptive and actionable.
• Added value_name for all arguments that accept values, improving clarity in help output.
• Included real-world usage examples in the long_about or as comments, based on actual CLI syntax and documentation.
• No changes to logic or behavior—only user-facing descriptions and documentation were improved.

PR Checklist

[ ] Added Tests (N/A: documentation/help only)
[x] Added Documentation (improved CLI help and usage)
[ ] Breaking changes (No breaking changes)

Note:

This PR does not introduce any breaking changes or modify command logic. All changes are focused on improving the CLI user experience through better documentation and help output.

[DaniPopes]

help is automatically derived from the doccomment, please remove

[MozirDmitriy]

help is automatically derived from the doccomment, please remove

Yes