start adding gh workflows

.github/workflows/stage.yaml

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+name: Stage new contribution
+
+on:
+  workflow_dispatch:
+    inputs:
+      resource_id:
+        description: "Bioimage.io resource identifier"
+        required: true
+        type: string
+      package_url:
+        description: "Download URL of the resource package zip-file"
+        required: true
+        type: string
+
+concurrency: ${{inputs.resource_id}}
+
+jobs:
+  call:
+    uses: ./.github/workflows/stage_call.yml
+    with:
+      resource_id: ${{inputs.resource_id}}
+      S3_HOST: ${{vars.S3_HOST}}
+      S3_BUCKET: ${{vars.S3_BUCKET}}
+      S3_FOLDER: ${{vars.S3_FOLDER}}
+    secrets: inherit

.github/workflows/test.yaml

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+name: test stage call
+
+on: push
+
+concurrency: ${{inputs.resource_id}}
+
+jobs:
+  call:
+    uses: ./.github/workflows/stage_call.yml
+    with:
+      resource_id: ${{vars.TEST_PACKAGE_ID}}
+      package_url: ${{vars.TEST_PACKAGE_URL}}
+      S3_HOST: ${{vars.S3_HOST}}
+      S3_BUCKET: ${{vars.S3_TEST_BUCKET}} # using test bucket
+      S3_FOLDER: ${{vars.S3_TEST_FOLDER}} # using test folder
+    secrets: inherit

requirements.txt

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+bioimageio.spec @ git+https://github.com/bioimage-io/spec-bioimage-io@adb33e04c84a40d981d51fdb9d22e718ec27ac35  # TODO: chenage to released version
+loguru==0.7.2
+minio==7.2.3
+packaging==23.2
+ruyaml==0.91.0
+spdx-license-list==3.22
+typer==0.9.0