Add Atom feed generator as a new package #25051

Job	Run time
Build: ubuntu-latest	1m 30s
Build: windows-latest	1m 10s
Test (E2E): ubuntu-latest (node@18)	5m 31s
Lint	1m 46s
Test: ubuntu-latest (node@18)	10m 2s
Test (Smoke): ubuntu-latest (node@18)	4m 57s
Test: ubuntu-latest (node@20)	9m 56s
Test: macos-14 (node@18)	7m 16s
Test (Smoke): windows-latest (node@18)	7m 25s
Test (E2E): windows-latest (node@18)	7m 36s
Test: windows-latest (node@18)	12m 29s
	1h 9m 38s

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