feat(cli): add shell completion script generation subcommand

[KokaKiwi]

Checklist

• I have read the Contributor Guide
• I have read and agree to the Code of Conduct
• I have added a description of my changes and why I'd like them included in the section below

Related Issues

• Resolves EDGEE-490

[coveralls]

Pull Request Test Coverage Report for Build 13640802961

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 10 (0.0%) changed or added relevant lines in 1 file are covered.
• 394 unchanged lines in 12 files lost coverage.
• Overall coverage decreased (-1.0%) to 37.15%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/cli/src/commands/completion.rs	0	10	0.0%

Files with Coverage Reduction	New Missed Lines	%
crates/cli/src/commands/components/init.rs	2	0.0%
crates/cli/src/commands/auth/login.rs	9	0.0%
crates/server/src/proxy/context/body.rs	10	0.0%
crates/components-runtime/src/context.rs	11	23.08%
crates/server/src/config.rs	11	89.91%
crates/cli/src/commands/components/new.rs	13	0.0%
crates/components-runtime/src/data_collection/debug.rs	21	0.0%
crates/server/src/proxy/compute/mod.rs	23	86.24%
crates/cli/src/components/manifest.rs	26	0.0%
crates/cli/src/commands/components/push.rs	74	0.0%

Totals
Change from base Build 13455062965:	-1.0%
Covered Lines:	2083
Relevant Lines:	5607

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💛 - Coveralls

[alexcasalboni]

Cool 🚀 I've only applied some minor docs (and help) updates