RFR: 7903479: JMH: Add .editorconfig so IDEs would pick up the common settings automatically: indent, trim whitespace [v2]

[Vladimir Sitnikov]

> See https://bugs.openjdk.org/browse/CODETOOLS-7903479
> 
> I tried re-format random files from JMH, and they either kept intact, or the changes were minimal.

Vladimir Sitnikov has updated the pull request incrementally with one additional commit since the last revision:

  trigger Actions CI

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Changes:
  - all: https://git.openjdk.org/jmh/pull/105/files
  - new: https://git.openjdk.org/jmh/pull/105/files/c3a80c07..22a3af69

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jmh&pr=105&range=01
 - incr: https://webrevs.openjdk.org/?repo=jmh&pr=105&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jmh/pull/105.diff
  Fetch: git fetch https://git.openjdk.org/jmh.git pull/105/head:pull/105

PR: https://git.openjdk.org/jmh/pull/105