Adds support for Colbert model

[jjviana]

This adds support for the ColBERT v2 model from https://github.com/stanford-futuredata/ColBERT

[codecov-commenter]

Codecov Report

Base: 40.04% // Head: 38.02% // Decreases project coverage by -2.01% :warning:

Coverage data is based on head (402c690) compared to base (0184253). Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #4 +/- ## ========================================== - Coverage 40.04% 38.02% -2.02% ========================================== Files 15 16 +1 Lines 1431 1507 +76 ========================================== Hits 573 573 - Misses 837 913 +76 Partials 21 21 ``` | [Impacted Files](https://codecov.io/gh/nlpodyssey/cybertron/pull/4?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlpodyssey) | Coverage Δ | | |---|---|---| | [pkg/tasks/scoring/colbert/ranking.go](https://codecov.io/gh/nlpodyssey/cybertron/pull/4/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlpodyssey#diff-cGtnL3Rhc2tzL3Njb3JpbmcvY29sYmVydC9yYW5raW5nLmdv) | `0.00% <0.00%> (ø)` | | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlpodyssey). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=nlpodyssey)

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