feat: Add redis standalone status

[amit-o]

Description

Add a simple status to the standalone Redis CRD

Fixes #638

Type of change

• New feature (non-breaking change which adds functionality)

Checklist

• Tests have been added/modified and all tests pass.
• Functionality/bugs have been confirmed to be unchanged or fixed.
• I have performed a self-review of my own code.
• Documentation has been updated or added where necessary.

Additional Context

[codecov]

Codecov Report

❌ Patch coverage is 4.00000% with 48 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (main@88d688a). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
internal/controller/redis/redis_controller.go	11.76%	13 Missing and 2 partials ⚠️
internal/k8sutils/statefulset.go	0.00%	15 Missing ⚠️
internal/k8sutils/status.go	0.00%	15 Missing ⚠️
internal/cmd/manager/cmd.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1477   +/-   ##
=======================================
  Coverage        ?   31.61%           
=======================================
  Files           ?       78           
  Lines           ?     6999           
  Branches        ?        0           
=======================================
  Hits            ?     2213           
  Misses          ?     4608           
  Partials        ?      178           

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