feat(algorithm): support single source shortest path algorithm

[diaohancai]

Purpose of the PR

• implement #283

Main Changes

Add single source shortest path algorithm. There are 3 types of target vertex：

1. single target:

   single_source_shortest_path.source_id="\"A\""
   single_source_shortest_path.target_id="\"E\""

2. multiple target:

   single_source_shortest_path.source_id="\"A\""
   single_source_shortest_path.target_id="\"E\", \"C\""

3. all target:

   single_source_shortest_path.source_id="\"A\""
   single_source_shortest_path.target_id=*

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. Unit test: org.apache.hugegraph.computer.algorithm.path.shortest.SingleSourceShortestPathTest#testRunAlgorithm

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 68.20276% with 69 lines in your changes are missing coverage. Please review.

Project coverage is 84.97%. Comparing base (ff85e34) to head (d55c7c7). Report is 13 commits behind head on master.

Files	Patch %	Lines
...orithm/path/shortest/SingleSourceShortestPath.java	62.88%	18 Missing and 18 partials :warning:
...rg/apache/hugegraph/computer/core/util/IdUtil.java	21.42%	8 Missing and 3 partials :warning:
...ph/computer/core/combiner/IdListMergeCombiner.java	0.00%	10 Missing :warning:
...ache/hugegraph/computer/core/util/JsonUtilExt.java	0.00%	6 Missing :warning:
...he/hugegraph/computer/core/graph/id/IdFactory.java	42.85%	3 Missing and 1 partial :warning:
...ath/shortest/SingleSourceShortestPathCombiner.java	75.00%	0 Missing and 1 partial :warning:
...m/path/shortest/SingleSourceShortestPathValue.java	96.87%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #285 +/- ## ============================================ - Coverage 85.03% 84.97% -0.07% - Complexity 3246 3359 +113 ============================================ Files 345 360 +15 Lines 12298 12678 +380 Branches 1102 1149 +47 ============================================ + Hits 10458 10773 +315 - Misses 1315 1341 +26 - Partials 525 564 +39 ```

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