Add git commit hash to CLI help & error output

[hu55a1n1]

Crate

ibc-relayer-cli

Summary

Print the git commit hash in the description. This makes it easier to identify the exact source that was used to create the CLI binary.

Proposal

Either we print a valid semver that contains the short/long commit hash, e.g. 1.2.3-unstable+develop.a68295 or 1.1.2+a682956dccae752aa24597a0f5cd939f93614509 ->

$ hermes
hermes 0.4.0-unstable+feature-branch.a68295
Informal Systems <hello@informal.systems>
Hermes is an IBC Relayer written in Rust.

# ...

Or, we print the commit hash as part of the description ->

$ hermes
hermes 0.4.0
Informal Systems <hello@informal.systems>
v0.4.0 [a682956dccae752aa24597a0f5cd939f93614509] built on 2021-06-16T21:30:10
Hermes is an IBC Relayer written in Rust.

# ...

Acceptance Criteria

The git commit hash must appear in the usage, help (including subcommand helps), version and error outputs.

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For Admin Use

• Not duplicate issue
• Appropriate labels applied
• Appropriate milestone (priority) applied
• Appropriate contributors tagged
• Contributor assigned/self-assigned