add stub emg configuration

config/emg_preprocessor-config.yml

+source:
+  type: swift
+  kwargs:
+    username: !env{{OS_USERNAME_DOWNLOAD}}
+    password: "!env{{OS_PASSWORD_DOWNLOAD}}"
+    tenant_name: "!env{{OS_TENANT_NAME_DOWNLOAD}}"
+    tenant_id: "!env{{OS_TENANT_ID_DOWNLOAD}}"
+    region_name: "!env{{OS_REGION_NAME_DOWNLOAD}}"
+    auth_url: "!env{{OS_AUTH_URL_DOWNLOAD}}"
+    auth_version: "!env{{ST_AUTH_VERSION_DOWNLOAD}}"
+    user_domain_name: !env{{OS_USER_DOMAIN_NAME_DOWNLOAD}}
+# target:
+#   type: swift
+#   kwargs:
+#     auth_version: !env{{ST_AUTH_VERSION}}
+#     auth_url: "!env{{OS_AUTH_URL}}"
+#     username: "!env{{OS_USERNAME}}"
+#     password: "!env{{OS_PASSWORD}}"
+#     tenant_name: !env{{OS_TENANT_NAME}}
+#     tenant_id: !env{{OS_TENANT_ID}}
+#     region_name: !env{{OS_REGION_NAME}}
+#     user_domain_name: !env{{OS_USER_DOMAIN_NAME}}
+target:
+  type: local
+  kwargs:
+    storage_path: /mnt/data/target
+
+workdir: /mnt/data/workdir
+keep_temp: true
+
+# metadata file to look for in downloaded tar/zip file
+metadata_glob: "*GSC*.xml"
+
+# extractors for Product type / level
+type_extractor:
+  # xpath can also be a list of xpaths to be tried one after another
+  xpath:
+    - /gsc:report/gsc:opt_metadata/gml:using/eop:EarthObservationEquipment/eop:platform/eop:Platform/eop:shortName/text()
+    - /gsc:report/gsc:sar_metadata/gml:using/eop:EarthObservationEquipment/eop:platform/eop:Platform/eop:shortName/text()
+  map: # optional mapping from extracted type name to used product type name
+    PHR_FUS__3: PH00
+
+level_extractor:
+  # xpath can also be a list of xpaths to be tried one after another
+  xpath: substring-after(substring-after(/gsc:report/gsc:opt_metadata/gml:metaDataProperty/gsc:EarthObservationMetaData/eop:parentIdentifier/text(), '/'), '/')
+  map: # optional mapping
+
+
+preprocessing:
+  defaults:
+    output:
+      options:
+        # WarpOptions (see https://gdal.org/python/osgeo.gdal-module.html#WarpOptions)
+        format: COG
+        dstSRS: "EPSG:4326"
+        dstNodata: 0
+        creationOptions:
+          - BLOCKSIZE=512
+          - COMPRESS=DEFLATE
+          - NUM_THREADS=8
+          - BIGTIFF=IF_SAFER
+          - OVERVIEWS=AUTO
+  types:
+    KS03:
+      nested: true
+      data_file_globs:
+        - "*.tif"
+      additional_file_globs:
+        - "*.rpc"
+      georeference:
+      stack_bands:
+        # stack all bands for each scene in the product
+        group_by: ".*/(.*)_P..tif"
+        sort_by: ".*_P(R|G|B|N).tif"
+        order:
+          - R
+          - G
+          - B
+          - N
+
+
+
+
+    RS02: # as extracted/translated above
+      # whether the package can contain sub-packages of TARs/ZIPs
+      nested: true
+      # glob selectors to look for source images in the source package
+      data_file_globs:
+        - "*.TIF"
+      additional_file_globs:
+        - "*.rpc"
+
+      # a custom preprocessor function to be called on all selected files
+      # custom_preprocessor:
+      #   path: "path.to.some.module:attribute"
+      #   # TODO: specify args/kwargs and pass meaningful parameters
+
+      georeference:
+        # georeference each file individually
+        # - type: geotransform # one of geotransform, RPC, GCP, world file
+        # - type: GCP
+
+
+      stack_bands:
+        # stack all bands for each scene in the product
+        group_by: # TODO: figure out a way to get a grouping. e.g: part of the filename using regex?
+
+      output:
+
+      # define a custom postprocessor function to be called on the processed file
+      # custom_postprocessor:
+      #   path: "path.to.some.module:attribute"
+      #   # TODO: specify args/kwargs and pass meaningful parameters
+
+    CS00:
+      nested: true
+      data_file_globs:
+        - "*.h5"
+
+      subdatasets:
+        data_file_glob: '*/*/*.h5'
+        subdataset_types:
+          '//S01/SBI': 'S01_SBI'
+
+      georeference:
+        type: corners
+        corner_names: ["S01_SBI_Bottom_Left_Geodetic_Coordinates", "S01_SBI_Bottom_Right_Geodetic_Coordinates", "S01_SBI_Top_Left_Geodetic_Coordinates", "S01_SBI_Top_Right_Geodetic_Coordinates"]
+        orbit_direction_name: Orbit_Direction
+        force_north_up: false
+        # gcp_srid:
+
+      calc:
+        formulas:
+          - inputs:
+              A:
+                glob: '*.tif'
+                band: 1
+              B:
+                glob: '*.tif'
+                band: 2
+            data_type: Float32
+            formula: sqrt(A.astype(float)*A.astype(float)+B.astype(float)*B.astype(float))
+            output_postfix: _proc
+            nodata_value: 0
+      output:
+        options:
+          # WarpOptions (see https://gdal.org/python/osgeo.gdal-module.html#WarpOptions)
+          format: "COG"
+          dstSRS: "EPSG:3857"
+          dstNodata: 0
+          creationOptions:
+            - BLOCKSIZE=512
+            - COMPRESS=DEFLATE
+            - LEVEL=6
+            - OVERVIEWS=AUTO
+            - NUM_THREADS=8
+            - BIGTIFF=IF_SAFER
+            - RESAMPLING=CUBIC
+    CS01:
+      nested: true
+      data_file_globs:
+        - "*.h5"
+
+      subdatasets:
+        data_file_glob: '*/*.h5'
+        subdataset_types:
+          '//S01/SBI': 'S01_SBI'
+
+      georeference:
+        type: corners
+
+# this configuration is still a stub