implement kcore algorithm

[javeme]

No description provided.

[codecov]

Codecov Report

Merging #143 (655c057) into master (66fc6f0) will decrease coverage by 0.14%.
The diff coverage is 63.04%.

@@ Coverage Diff @@ ## master #143 +/- ## ============================================ - Coverage 88.07% 87.92% -0.15%  - Complexity 2892 2917 +25  ============================================ Files 303 306 +3 Lines 10890 10982 +92 Branches 918 930 +12 ============================================ + Hits 9591 9656 +65  - Misses 859 877 +18  - Partials 440 449 +9 

Impacted Files	Coverage Δ
...computer/algorithm/community/kcore/KcoreValue.java	52.77% <52.77%> (ø)
...raph/computer/algorithm/community/kcore/Kcore.java	61.36% <61.36%> (ø)
...omputer/algorithm/community/kcore/KcoreParams.java	100.00% <100.00%> (ø)
...k8s/operator/controller/ComputerJobController.java	89.13% <0.00%> (+1.44%)	⬆️
...raph/computer/k8s/operator/OperatorEntrypoint.java	88.03% <0.00%> (+2.56%)	⬆️

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