Add: Palindrome Linked List

[awesee]

No description provided.

[codecov-io]

Codecov Report

Merging #392 into master will not change coverage.
The diff coverage is 100%.

@@          Coverage Diff          @@
##           master   #392   +/-   ##
=====================================
  Coverage     100%   100%           
=====================================
  Files         141    142    +1     
  Lines        1422   1434   +12     
=====================================
+ Hits         1422   1434   +12

Impacted Files	Coverage Δ
...s/palindrome-linked-list/palindrome_linked_list.go	100% <100%> (ø)

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