refactor: migrate r2 commands to new command registration setup #5105

Job	Run time
Checks	0s
Add PR to project	3s
Checks	4m 36s
Tests (macos-13, ./fixtures/*)	8m 18s
Tests (macos-13, ./packages/*)	8m 10s
Tests (ubuntu-latest, ./packages/*)	3m 55s
Tests (ubuntu-latest, ./tools)	32s
Tests (ubuntu-latest, ./fixtures/*)	4m 36s
Tests (windows-latest, ./fixtures/*)	7m 44s
Tests (windows-latest, ./packages/*)	6m 16s
	44m 10s

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