non-equi join rewrite numba (#1341)

- reimplementation of the algorithm that powers the non-equi join in numba
- more info in the docs regarding range joins, and where numba can be helpful
- improved performance for numba for range joins and multiple non equi joins when getting first/last match

Author: samukweku

CHANGELOG.md

@@ -1,10 +1,11 @@
 # Changelog
 
 ## [Unreleased]
--  [ENH] Added a `pivot_longer` method, and a `pivot_longer_spec` function for polars - Issue #1352
+
+- [ENH] Added a `pivot_longer` method, and a `pivot_longer_spec` function for polars - Issue #1352
 
 - [ENH] Improved performance for non-equi joins when using numba - @samukweku PR #1341
--  [ENH] Added a `clean_names` method for polars - it can be used to clean the column names, or clean column values . Issue #1343
+- [ENH] Added a `clean_names` method for polars - it can be used to clean the column names, or clean column values . Issue #1343
 - [ENH] Added a `pivot_longer` method, and a `pivot_longer_spec` function for polars - Issue #1352 @samukweku
 
 ## [v0.27.0] - 2024-03-21