Add proper mdns support #1303

Job	Run time
build-frontend	23s
getvars / get-vars	6s
build-firmware (Wemos-D1-Mini-ESP32)	34s
build-firmware (Wemos-Lolin-S2-Mini)	53s
build-firmware (Wemos-Lolin-S3)	51s
build-firmware (Wemos-Lolin-S3-Mini)	53s
build-firmware (Waveshare_esp32_s3_zero)	49s
build-firmware (Pishock-2023)	35s
build-firmware (Pishock-Lite-2021)	49s
build-firmware (Seeed-Xiao-ESP32C3)	51s
build-firmware (Seeed-Xiao-ESP32S3)	49s
build-firmware (DFRobot-Firebeetle2-ESP32E)	35s
build-firmware (OpenShock-Core-V1)	49s
build-firmware (OpenShock-Core-V2)	48s
build-staticfs	37s
merge-partitions	0s
checkpoint-build	0s
cdn-upload-version-info	0s
cdn-upload-firmware	0s
cdn-bump-version	0s
checkpoint-cdn	0s
release	0s
	10m 22s

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