feat: add Smith-Waterman algorithm for local sequence alignment (#960)

Author: AliAlimohammadi

DIRECTORY.md

@@ -103,10 +103,11 @@
     * [Minimum Cost Path](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/minimum_cost_path.rs)
     * [Optimal Bst](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/optimal_bst.rs)
     * [Rod Cutting](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/rod_cutting.rs)
+    * [Smith-Waterman](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/smith_waterman.rs)
     * [Snail](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/snail.rs)
     * [Subset Generation](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/subset_generation.rs)
-    * [Task Assignment](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/task_assignment.rs)
     * [Subset Sum](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/subset_sum.rs)
+    * [Task Assignment](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/task_assignment.rs)
     * [Trapped Rainwater](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/trapped_rainwater.rs)
     * [Word Break](https://github.com/TheAlgorithms/Rust/blob/master/src/dynamic_programming/word_break.rs)
   * Financial

src/dynamic_programming/mod.rs

@@ -14,6 +14,7 @@ mod maximum_subarray;
 mod minimum_cost_path;
 mod optimal_bst;
 mod rod_cutting;
+mod smith_waterman;
 mod snail;
 mod subset_generation;
 mod subset_sum;
@@ -45,6 +46,7 @@ pub use self::maximum_subarray::maximum_subarray;
 pub use self::minimum_cost_path::minimum_cost_path;
 pub use self::optimal_bst::optimal_search_tree;
 pub use self::rod_cutting::rod_cut;
+pub use self::smith_waterman::{score_function, smith_waterman, traceback};
 pub use self::snail::snail;
 pub use self::subset_generation::list_subset;
 pub use self::subset_sum::is_sum_subset;