chore: Add a newline formatting configuration and a comment for warning

apache / incubator-hugegraph

A graph database that supports more than 100+ billion data, high performance and scalability (Include OLTP Engine & REST-API & Backends)

Apache License 2.0

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Purpose of the PR

fix the https://github.com/apache/incubator-hugegraph/issues/2435 's subtask

Main Changes

Add a newline formatting configuration(via hg-style.xml)
Add a comment for the IDEA unsupported warning about continuation_indent_size

Verifying these changes

[ ] Trivial rework / code cleanup without any test coverage. (No Need)
[ ] Already covered by existing tests, such as (please modify tests here).
[ ] Need tests and can be verified as follows:
- xxx

Does this PR potentially affect the following parts?

[ ] Nope
[ ] Dependencies (add/update license info)
[ ] Modify configurations
[ ] The public API
[x] Other affects (typed here)
- [x] When you use hugegraph-style.xml for code reformat, this pr mentions changes that will affect the final result

Documentation Status

[ ] Doc - TODO
[ ] Doc - Done
[x] Doc - No Need

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 66.28%. Comparing base (47a68f0) to head (89a7708).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2464 +/- ## ============================================ + Coverage 63.80% 66.28% +2.47% + Complexity 829 827 -2 ============================================ Files 511 511 Lines 42622 42622 Branches 5947 5947 ============================================ + Hits 27193 28250 +1057 + Misses 12679 11558 -1121 - Partials 2750 2814 +64 ```

apache / incubator-hugegraph