Tracking Issues: support t-digest data structure and commands

[LindaSummer]

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• [X] I had searched in the issues and found no similar issues.

Motivation

Redis Stack already supports this probabilistic data structure, and we can support it too.

• #2423

This includes:

• [ ] Implementing t-digest algorithm interface with encoding and decoding
• [ ] Implementing command TDIGEST.CREATE
• [ ] Implementing command TDIGEST.RESET
• [ ] Implementing command TDIGEST.ADD
• [ ] Implementing command TDIGEST.MERGE
• [ ] Implementing command TDIGEST.QUANTILE
• [ ] Implementing command TDIGEST.CDF
• [ ] Implementing command TDIGEST.RANK
• [ ] Implementing command TDIGEST.REVRANK
• [ ] Implementing command TDIGEST.BYRANK
• [ ] Implementing command TDIGEST.BYREVRANK
• [ ] Implementing command TDIGEST.TRIMMED_MEAN
• [ ] Implementing command TDIGEST.INFO
• [ ] Implementing command TDIGEST.MAX
• [ ] Implementing command TDIGEST.MIN
• [ ] Documentation to website

Solution

• #2542

Are you willing to submit a PR?

• [X] I'm willing to submit a PR!