WIP: command to scan for new translation

[sdassow]

Description:

Adds a translate command that scans for new translation and updates the translations file. No tests and nothing yet, this is to get initial feedback and see what else it needs to be acceptable for a merge.

Checklist:

• Tests included.
• Lint and formatter run with no errors.
• Tests all pass.

Where applicable:

• Public APIs match existing style and have Since: line.
• No breaking changes (new command).
• Check for binary size increases when importing new modules.

[andydotxyz]

Can you please factor code out of the 'Translate' method? 120 lines seems very long for something that could be broken down. That would also facilitate adding a test :).

Lastly do note to check the boxes on your PR template so we can see where it's at

[coveralls]

coverage: 65.697% (-0.3%) from 66.027%
when pulling cced842 on sdassow:add-translate-command
into 119d2f8 on fyne-io:develop.

[andydotxyz]

Just FYI we have now update the CI version requirements so you'll need to rebase on latest develop to get a full build to pass