chore: CLI readme update

[dhfang]

Adds a bit more detail to the CLI readme, referencing new documentation and commands.

[greptile-apps]

Greptile Summary

The PR expands the CLI README with prerequisites, supported chain and client types, links to detailed documentation, and examples covering deployment, token operations, relayer, and attestor commands.

• Documents Go and platform prerequisites.
• Adds GMP and IFT deployment and transaction examples.
• Updates configuration, command-reference, tutorial, and E2E documentation links.

Confidence Score: 5/5

The documentation-only change appears safe to merge.

The added links resolve, the Go prerequisite matches the CLI build configuration, and the documented command paths and flags match the current CLI.

Important Files Changed

Filename	Overview
cli/README.md	Expands CLI setup and command documentation; the added links, version requirement, command names, and flags align with the repository.

_{Reviews (1): Last reviewed commit: a6b83d6 | Re-trigger Greptile}