improve app list output and pagination handling

[jarugupj]

• Improved the list output for apps
• refactored the limit to be 20 by default for deployments and apps returned

[mesa-dot-dev]

Mesa Description

• Improved the list output for apps by adding a --limit flag to the app list command.
• Standardized the default number of items returned to 20 for the app list, app history, and deploy history commands for a more consistent experience.

^{Description generated by Mesa. Update settings}

[mesa-dot-dev]

Performed full review of f66cb26...167f890

Analysis

1. Client-side pagination in cmd/app.go fetches all data before filtering, which won't scale well with large datasets
2. While standardizing pagination limits to 20 entries improves typical performance, the approach is inconsistent by mixing client-side and server-side pagination strategies

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^{2 files reviewed | 0 comments | Edit Agent Settings}

[masnwilliams]

lgtm