2164 add dfss operator and plots

pyproject.toml

@@ -75,7 +75,7 @@ source = ["src"]
 # TODO: Figure out how to test loaders. This will likely involve having some
 # example configurations and may be part of the effort to test the workflow.
 # Omit _netCDF4.pyx to work around https://github.com/conda-forge/netcdf4-feedstock/issues/188
-omit = ["__main__.py", "src/CSET/loaders/*.py", "_netCDF4.pyx"]
+omit = ["__main__.py", "src/CSET/loaders/*.py", "_netCDF4.pyx", "src/CSET/operators/improver/*.py"]
 
 [tool.codespell]
 ignore-words-list = "lazyness,meaned,runn,PRES"
@@ -84,6 +84,7 @@ skip = "build,*.css,*.ipynb,*.js,*.html,*.svg,*.xml,.git"
 [tool.ruff]
 line-length = 88
 src = ["src", "test"]
+exclude = ["src/CSET/operators/improver/*"]
 
 [tool.ruff.lint]
 extend-select = ["B", "D", "I"]

src/CSET/operators/__init__.py

@@ -32,6 +32,7 @@
     collapse,
     constraints,
     convection,
+    dfss,
     ensembles,
     feature,
     filters,
@@ -82,6 +83,7 @@
     "transect",
     "wind",
     "write",
+    "dfss",
 ]
 
 # Stop iris giving a warning whenever it loads something.