add .editorconfig file #169

Job	Run time
Compatibility test	4m 58s
Soundness / Broken symlinks check	4s
Soundness / API breakage check	0s
Soundness / Documentation check	1m 43s
Soundness / Format check	33s
Soundness / License headers check	6s
Soundness / Shell check	30s
Soundness / Unacceptable language check	5s
Example packages / Linux (5.9)	17m 14s
Example packages / Windows (nightly-6.0)	1s
Example packages / Linux (5.10)	15m 44s
Example packages / Windows (6.0)	2s
Example packages / Windows (nightly-main)	3s
Integration test / Linux (5.9)	1m 45s
Example packages / Linux (6.0)	17m 4s
Integration test / Linux (5.10)	1m 44s
Example packages / Linux (nightly-6.0)	21m 50s
Integration test / Linux (6.0)	1m 49s
Example packages / Linux (nightly-main)	30s
Integration test / Windows (6.0)	2s
Integration test / Linux (nightly-6.0)	2m 12s
Integration test / Windows (nightly-6.0)	2s
Integration test / Linux (nightly-main)	29s
Integration test / Windows (nightly-main)	1s
Soundness / Python lint check	7s
Soundness / YAML lint check	0s
Unit tests / Unit tests / Windows (6.0)	1s
Unit tests / Unit tests / Windows (nightly-6.0)	2s
Unit tests / Unit tests / Linux (5.9)	1m 35s
Unit tests / Unit tests / Windows (nightly-main)	1s
Unit tests / Unit tests / Linux (5.10)	1m 41s
Unit tests / Unit tests / Linux (6.0)	1m 47s
Unit tests / Unit tests / Linux (nightly-6.0)	2m 8s
Unit tests / Unit tests / Linux (nightly-main)	30s
	1h 36m 23s

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