feat: add examples to --help output for complex commands

[angeloashmore]

Resolves: #148

Description

Adds EXAMPLES sections to --help output for commands with non-obvious flag combinations: field add rich-text, field add content-relationship, field add select, type create, and slice connect.

Checklist

• A comprehensive Linear ticket, providing sufficient context and details to facilitate the review of the PR, is linked to the PR.
• If my changes require tests, I added them.
• If my changes affect backward compatibility, it has been discussed.
• If my changes require an update to the CONTRIBUTING.md guide, I updated it.

Preview

How to QA ¹

Run --help for each modified command and verify the EXAMPLES section appears:

• prismic field add rich-text --help
• prismic field add content-relationship --help
• prismic field add select --help
• prismic type create --help
• prismic slice connect --help

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Note

Low Risk
Low risk: changes only add EXAMPLES text blocks to --help output and do not modify command execution logic.

Overview
Improves CLI discoverability by adding EXAMPLES sections to --help output for several commands with non-obvious flag combinations.

Examples were added to field add content-relationship, field add link, field add rich-text, field add select, field edit, slice connect, type create, and webhook create, without changing runtime behavior.

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[angeloashmore]

Let's include examples in more commands. Think about what commands will be most commonly used AND are complex. We need to provide examples for those commands.