proposal: Add `RecentnessRanker` component

[elundaeva]

Here's the link to the code for this reranker: https://github.com/deepset-ai/haystack/pull/5301/files

Related Issues

• fixes #issue-number

Proposed Changes:

How did you test it?

Notes for the reviewer

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.
• I documented my code
• I ran pre-commit hooks and fixed any issue

[ZanSara]

Hey @elundaeva! I'll remove the proposal tag, as it has a different meaning and doesn't apply here :slightly_smiling_face:

[sjrl]

Hey @ZanSara just to let you know, @elundaeva will be splitting this up into two separate PRs, one for the proposal and one for a draft PR of the code changes.

[elundaeva]

Thank you everyone for the feedback, the proposal is now merged 🙂 💯