add .editorconfig file #27

Job	Run time
Soundness / API breakage check	48s
Soundness / Format check	36s
Soundness / Documentation check	1m 1s
Soundness / Broken symlinks check	2s
Soundness / License headers check	4s
Soundness / Python lint check	8s
Soundness / Shell check	31s
Soundness / Unacceptable language check	4s
Soundness / YAML lint check	5s
Benchmarks / Benchmarks / Linux (5.9)	2m 26s
Benchmarks / Benchmarks / Windows (6.0)	3s
Benchmarks / Benchmarks / Linux (5.10)	2m 10s
Benchmarks / Benchmarks / Linux (6.0)	2m 26s
Benchmarks / Benchmarks / Windows (nightly-6.0)	2s
Benchmarks / Benchmarks / Windows (nightly-main)	2s
Cxx interop / Cxx interop / Linux (5.9)	42s
Benchmarks / Benchmarks / Linux (nightly-6.0)	3m 11s
Cxx interop / Cxx interop / Linux (5.10)	47s
Benchmarks / Benchmarks / Linux (nightly-main)	2m 39s
Cxx interop / Cxx interop / Linux (6.0)	51s
Cxx interop / Cxx interop / Linux (nightly-6.0)	53s
Cxx interop / Cxx interop / Linux (nightly-main)	57s
Cxx interop / Cxx interop / Windows (6.0)	1s
Cxx interop / Cxx interop / Windows (nightly-6.0)	2s
Cxx interop / Cxx interop / Windows (nightly-main)	2s
Unit tests / Unit tests / Linux (5.9)	37s
Unit tests / Unit tests / Windows (6.0)	14m 3s
Unit tests / Unit tests / Windows (nightly-6.0)	9m 28s
Unit tests / Unit tests / Linux (5.10)	37s
Unit tests / Unit tests / Windows (nightly-main)	9m 31s
Unit tests / Unit tests / Linux (6.0)	48s
Unit tests / Unit tests / Linux (nightly-6.0)	57s
Unit tests / Unit tests / Linux (nightly-main)	58s
	57m 32s

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