Add validate PDFA command

[MohamedK1]

Description

PDF/A format is a standardized version of PDF designed specifically for archiving and long-term preservation of electronic documents. It requires the PDF/A documents to be 100% self-contained and platform independent.

Adding command to validate PDF/A along with showing details of validation.

Screencast

https://github.com/raycast/extensions/assets/41074872/114101dc-cf2e-46dc-9878-9cb54f878615

Checklist

• [x] I read the extension guidelines
• [x] I read the documentation about publishing
• [x] I ran npm run build and tested this distribution build in Raycast
• [x] I checked that files in the assets folder are used by the extension itself
• [x] I checked that assets used by the README are placed outside of the metadata folder

[raycastbot]

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🔔 @MohamedK1 you might want to have a look.

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[mil3na]

Hey! Same here: can you please fix the conflicts?

[MohamedK1]

@mil3na I Fixed the conflict in both commands. It's the same changelog/package.json conflict due to merging other commands

[github-actions[bot]]

Published to the Raycast Store: https://raycast.com/mohamedk1/ilovepdf

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