Standardize text format and grammar across CLI commands, args, and options

[mlejva]

• The hints start always with lowercase
• The hints end with a period if there's more than 1 sentence

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 697bef98289d23ce6cb3f0a7b959df86ebf89211

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | -------- | ----- | | @e2b/cli | Patch |

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