feat: warn when a flow is deleted

[scolladon]

Explain your changes

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Add a warning in the output of SGD when the plugin detect a deletion of a flow

Does this close any currently open issues?

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closes #893

• [X] Jest tests added to cover the fix.

Any particular element that can be tested locally

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Any other comments

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[scolladon]

Please help reviewing here @amtrack :)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 100.00%. Comparing base (f79d3dc) to head (39d040f).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #894 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 39 40 +1 Lines 1066 1074 +8 Branches 115 115 ========================================= + Hits 1066 1074 +8 ```

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[scolladon]

Hi @amtrack !

We have updated the warning message and the readme, what do you think now ?

[codeclimate[bot]]

Code Climate has analyzed commit 39d040fd and detected 0 issues on this pull request.

View more on Code Climate.

[github-actions[bot]]

Shipped in release v5.41.0. You can install the new version using the version number or the latest-rc channel

$ sfdx plugins:install sfdx-git-delta@latest-rc
$ sfdx plugins:install sfdx-git-delta@v5.41.0

Happy incremental deployment!