feat(wrangler): add local DO support with getPlatformProxy #6224

Job	Run time
Checks	0s
Add PR to project	3s
Checks	4m 48s
Tests (macos-13, ./fixtures/*)	11m 45s
Tests (macos-13, ./packages/*)	7m 21s
Tests (ubuntu-latest, ./fixtures/*)	7m 52s
Tests (ubuntu-latest, ./packages/*)	3m 59s
Tests (ubuntu-latest, ./tools)	44s
Tests (windows-latest, ./fixtures/*)	10m 12s
Tests (windows-latest, ./packages/*)	7m 0s
	53m 44s

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