docs: add Collaboration Principles section to AGENTS.md #2340

Job	Run time
Formatting	15s
Test (nightly)	4m 31s
Test (stable)	4m 8s
Build on macos-latest (nightly)	57s
Build on windows-latest (stable)	2m 19s
Build on windows-latest (nightly)	1m 41s
Build on macos-latest (stable)	42s
	14m 33s

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