Workspace upgrade (dependencies) & gitignore sync

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In preparation for #760, I wanted to extract the dependency upgrades & improvements needed.
This PR:

• updates the lock files from running pub upgrade everywhere
• removes gradle wrapper binaries, in line with how new flutter projects are created (flutter create -t app ..)
• upgrades Android/detekt to reduce security warnings
• upgrades Android/protobuf to reduce gradle warnings
• minimally upgrades formatting to comply with detekt/ktlint configs
• removes .ruby-version, a rbenv related file, as it is not relevant to the project (it's a detail on developer machines)

In order to get analyzer bumped to the latest version (and remove warnings etc), this PR needs to get merged in functional_data first & this project would then bump the dependency as needed.

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@Taym95 appreciate a review if you have a minute :-)

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I omitted a change log as no consumer-relevant changes are included this time, just build time/formatting improvements at most.

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I omitted a change log as no consumer-relevant changes are included this time, just build time/formatting improvements at most.

The dart constraint update (to '>= 3.3.0', from '>=3.2.0-194.0.dev'), is technically a change but realistically yields the same version for consumers.

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@Taym95 let me know if this needs further adjustments

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Thank you @Taym95 - soo much cleaner over in #760 :)