Implemented Plan to Eat migration

[NullCosmos]

What type of PR is this?

• documentation
• feature

What this PR does / why we need it:

• Improvement: mealie/services/scraper/cleaner was updated to filter out any ingredients that are blank.
• Feature: Added a migration for Plan to Eat CSV exports.
• Feature: Added an image_scraper to migration_helpers so that image urls can be scraped from the Plan to Eat export.

Which issue(s) this PR fixes:

Not applicable.

Special notes for your reviewer:

Borrowed code layout, style, & format from Paprika migration implementation.

Testing

• Added a unit test for Plan to Eat that includes 3 scenarios, including blank fields & extra newlines to ensure it handles missing data correctly.
• Tested a full migration using my personal recipe export containing over 200 recipes.

Release Notes

Adds Plan to Eat to list of compatible migrations

[michael-genson]

Great work, thanks! FYI for the future - you only need to add new translation strings to the en-US.json file, we have automations to take care of the rest.