feat(multiple_LCS): addition done

Author: Gaspardcode

DIRECTORY.md

@@ -329,6 +329,7 @@
     * [Levenshtein Distance](https://github.com/TheAlgorithms/Rust/blob/master/src/string/levenshtein_distance.rs)
     * [Lipogram](https://github.com/TheAlgorithms/Rust/blob/master/src/string/lipogram.rs)
     * [Manacher](https://github.com/TheAlgorithms/Rust/blob/master/src/string/manacher.rs)
+    * [Multiple Longest Common Subsequence](https://github.com/TheAlgorithms/Rust/blob/master/src/string/multiple_longest_common_subsequence.rs)
     * [Palindrome](https://github.com/TheAlgorithms/Rust/blob/master/src/string/palindrome.rs)
     * [Pangram](https://github.com/TheAlgorithms/Rust/blob/master/src/string/pangram.rs)
     * [Rabin Karp](https://github.com/TheAlgorithms/Rust/blob/master/src/string/rabin_karp.rs)

src/string/mod.rs

@@ -12,6 +12,7 @@ mod knuth_morris_pratt;
 mod levenshtein_distance;
 mod lipogram;
 mod manacher;
+mod multiple_longest_common_subsequence;
 mod palindrome;
 mod pangram;
 mod rabin_karp;
@@ -39,6 +40,7 @@ pub use self::knuth_morris_pratt::knuth_morris_pratt;
 pub use self::levenshtein_distance::{naive_levenshtein_distance, optimized_levenshtein_distance};
 pub use self::lipogram::is_lipogram;
 pub use self::manacher::manacher;
+pub use self::multiple_longest_common_subsequence::multiple_longest_common_subsequence;
 pub use self::palindrome::is_palindrome;
 pub use self::pangram::is_pangram;
 pub use self::pangram::PangramStatus;