feat(core): support output filter

[diaohancai]

Purpose of the PR

• close #302

Main Changes

1. computation results output supports custom write.
2. SingleSourceShortestPathOutput implements org.apache.hugegraph.computer.core.output.ComputerOutput#filter

Verifying these changes

• [ ] Trivial rework / code cleanup without any test coverage. (No Need)
• [ ] Already covered by existing tests, such as (please modify tests here).
• [X] Need tests and can be verified as follows. org.apache.hugegraph.computer.algorithm.path.shortest.SingleSourceShortestPathTest

Does this PR potentially affect the following parts?

• [X] Nope
• [ ] Dependencies (add/update license info)
• [ ] Modify configurations
• [ ] The public API
• [ ] Other affects (typed here)

Documentation Status

• [ ] Doc - TODO
• [ ] Doc - Done
• [X] Doc - No Need

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 84.97%. Comparing base (e0b484a) to head (724fbd1). Report is 11 commits behind head on master.

:exclamation: Current head 724fbd1 differs from pull request most recent head c64b5c5

Please upload reports for the commit c64b5c5 to get more accurate results.

Files	Patch %	Lines
.../path/shortest/SingleSourceShortestPathOutput.java	50.00%	0 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #303 +/- ## ============================================ - Coverage 85.03% 84.97% -0.06% - Complexity 3296 3366 +70 ============================================ Files 349 360 +11 Lines 12485 12683 +198 Branches 1130 1151 +21 ============================================ + Hits 10616 10778 +162 - Misses 1329 1342 +13 - Partials 540 563 +23 ```

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[coderzc]

Please split algorithm module change to another PR.

[diaohancai]

Please split algorithm module change to another PR.

Done.