Add GETDEL command support

[dpevunov-cp]

Summary

• Adds getDel to the Getter algebra and implements it in BaseRedis via Lettuce's getdel.
• Adds an integration test in TestScenarios.stringsScenario covering missing key, existing key, and post-call deletion.

Example

for {
  _    <- redis.set("key", "value")
  v    <- redis.getDel("key")    // Some("value")
  gone <- redis.get("key")       // None
} yield ()

Test plan

• sbt tests/Test/compile
• sbt scalafmtCheckAll
• Integration test stringsScenario passes against a live Redis

🤖 Generated with Claude Code

[dpevunov-cp]

@arturaz
@mmienko

Could I get your review please?

[Copilot]

Pull request overview

Adds support for the Redis GETDEL command by extending the Getter algebra with a getDel method, implementing it in BaseRedis using Lettuce's getdel, and adding an integration test that covers missing-key, existing-key, and post-call deletion semantics.

Changes:

• Add getDel method to the Getter algebra trait.
• Implement getDel in BaseRedis via Lettuce's getdel.
• Extend stringsScenario integration test with assertions for getDel behavior.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated no comments.

File	Description
modules/effects/src/main/scala/dev/profunktor/redis4cats/algebra/strings.scala	Adds getDel to the Getter algebra.
modules/effects/src/main/scala/dev/profunktor/redis4cats/redis.scala	Implements getDel in BaseRedis using Lettuce's getdel.
modules/tests/src/test/scala/dev/profunktor/redis4cats/TestScenarios.scala	Adds integration test coverage for missing key, existing key, and post-delete state.

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[yisraelU]

looks good. ty

[dpevunov-cp]

looks good. ty

Thank you for merging and approval!
What are the next steps to have it published in new library version? I want to be able to use it in my repo.

[yisraelU]

@dpevunov-cp we publish snapshots upon merge