#5858 add FlowCrypt secure messaging options in Gmail's actions menu

[martgil]

This PR add's secure compose's messaging options within Gmail's action menu.

Here is the short demo of the proposed changes of this PR:

Screencast.from.2024-11-23.15-44-54.webm

close #5858

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Tests (delete all except exactly one):

• Tests added or updated

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To be filled by reviewers

I have reviewed that this PR... (tick whichever items you personally focused on during this review):

• addresses the issue it closes (if any)
• code is readable and understandable
• is accompanied with tests, or tests are not needed
• is free of vulnerabilities
• is documented clearly and usefully, or doesn't need documentation

[martgil]

Hi @sosnovsky - Good day, this one is ready for a review. thanks!

[martgil]

Hi @sosnovsky - I think there are still some more fragile tests that are barely passing. For example in this PR there are approximately 3 tests, takes turns not to pass for every consecutive runs.

[martgil]

Hi @sosnovsky - Good day. Is it possible for us to merge this first. The live test for this one tends to fail pretty often so I'd like to request if its possible? thanks!

[sosnovsky]

Works great 👍

[sosnovsky]

All good now, thanks!