chore: Add codecov.yaml config #994

Job	Run time
Actions lint check	27s
Docs check / Docs check	1m 8s
Type check / Type check (3.11)	22s
Type check / Type check (3.12)	24s
Type check / Type check (3.13)	23s
Type check / Type check (3.10)	20s
Unit tests / Unit tests (ubuntu-latest, 3.12)	37s
Integration tests / Integration tests (ubuntu-latest, 3.10)	7m 41s
Lint check / Lint check (3.12)	14s
Unit tests / Unit tests (windows-latest, 3.10)	1m 31s
Unit tests / Unit tests (ubuntu-latest, 3.10)	36s
Lint check / Lint check (3.13)	12s
Type check / Type check (3.14)	23s
Unit tests / Unit tests (windows-latest, 3.12)	1m 1s
Unit tests / Unit tests (windows-latest, 3.13)	1m 4s
Unit tests / Unit tests (ubuntu-latest, 3.13)	39s
Lint check / Lint check (3.14)	12s
Integration tests / Integration tests (ubuntu-latest, 3.14)	8m 54s
Unit tests / Unit tests (ubuntu-latest, 3.14)	41s
Unit tests / Unit tests (ubuntu-latest, 3.11)	42s
Unit tests / Unit tests (windows-latest, 3.11)	58s
Unit tests / Unit tests (windows-latest, 3.14)	1m 4s
Lint check / Lint check (3.11)	13s
Lint check / Lint check (3.10)	10s
	29m 56s

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