ci: automated update to rustc 1.87.0

[create-pr-actions]

Automated update to Github CI workflow cont_integration.yml by create-pull-request GitHub action

[notmandatory]

The main clippy error I had to fix was: result_large_err

Because I had to change the error enums to box large types I believe this becomes an API breaking change. Should we loosen the allowed enum size and fix the result_large_error clippy errors in the 3.0 milestone or fix this now?

I also added a Justfile to help run cargo clippy and cargo test with and without the MSRV.

The required CI tasks will also need to be updated from 1.85.0 to 1.87.0 before any version of this PR can be merged.

[notmandatory]

I updated the clippy.toml config to allow the larger enum and error types for now and created #245 for the larger fix.

[oleonardolima]

cACK a2377f3

[oleonardolima]

ACK a2377f3

[ValuedMammal]

ACK a2377f3

[ValuedMammal]

We'll need an update again to change the clippy config if we want this to go in before doing the necessary API changes.

[notmandatory]

Updated clippy.toml again to be exactly the max required to pass clippy tests for current code.

[notmandatory]

I updated the master branch protection rules to require tests for rust 1.87, all open PRs will need to be rebased.