Move marketplace definitions to openhands.sdk.marketplace module (#2786) #10952

Job	Run time
build-binary-and-test (macos-latest)	3m 20s
build-binary-and-test (ubuntu-latest)	2m 52s
Check OpenAPI Schema	36s
Build & Push (python-amd64)	9m 45s
Build & Push (python-arm64)	7m 20s
Build & Push (java-arm64)	6m 55s
Build & Push (java-amd64)	8m 48s
Build & Push (golang-amd64)	9m 48s
Build & Push (golang-arm64)	8m 7s
Merge Multi-Arch Manifests (golang)	26s
Merge Multi-Arch Manifests (python)	26s
Merge Multi-Arch Manifests (java)	15s
Consolidate Build Information	0s
Update PR description with agent server image	-1s
	58m 37s

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