add executible example (#33)

Author: d-v-b

examples/convert_local.sh

@@ -0,0 +1,14 @@
+#! /usr/bin/env bash
+
+# Convert to GeoZarr stored on the local file system
+
+eopf-geozarr convert \
+https://objectstore.eodc.eu:2222/e05ab01a9d56408d82ac32d69a5aae2a:sample-data/tutorial_data/cpm_v253/S2B_MSIL1C_20250113T103309_N0511_R108_T32TLQ_20250113T122458.zarr \
+./tests-output/eopf_geozarr/s2b_test.zarr \
+--groups /measurements/reflectance/r10m /measurements/reflectance/r20m /measurements/reflectance/r60m /quality/l1c_quicklook/r10m \
+--crs-groups /conditions/geometry \
+--spatial-chunk 4096 \
+--min-dimension 256 \
+--tile-width 256 \
+--max-retries 2 \
+--verbose