Add justfile for commonly used dev/administrative commands

Author: Fingel

Justfile

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+# Run offline unit tests
+test:
+    pytest
+
+# Run tests that communicate with observatory services
+test-online: test
+    pytest -m online
+
+# Same as test-online but tries to guarantee no data is modified
+test-no-side-effect: test
+    pytest -m online -m "not side_effect"
+
+# Update LCO generated instrument file
+update-lco:
+    curl https://observe.lco.global/api/instruments/ | codegen/lco/generator.py LCO > src/aeonlib/ocs/lco/instruments.py
+
+# Update SOAR generated instrument file
+update-soar:
+    curl https://observe.lco.global/api/instruments/ | codegen/lco/generator.py SOAR > src/aeonlib/ocs/soar/instruments.py
+
+# Update SAAO generated instrument file
+update-saao:
+    curl https://ocsio.saao.ac.za/api/instruments/ | codegen/lco/generator.py SAAO > src/aeonlib/ocs/saao/instruments.py
+
+# Update all generated instrument files
+update-all: update-lco update-soar update-saao
+    @echo "All updates completed"