feat: add wutta import-csv command

docs/index.rst

@@ -5,6 +5,15 @@ WuttaSync
 This package adds data import/export and real-time sync utilities for
 the `Wutta Framework <https://wuttaproject.org>`_.
 
+The primary use cases here are:
+
+* keep "operational" data in sync between e.g. various business systems
+* import data from user-specified file
+* export to file
+
+This isn't really meant to replace typical ETL tools; it is smaller
+scale and (hopefully) more flexible.
+
 While it of course supports import/export to/from the Wutta :term:`app
 database`, it may be used for any "source → target" data flow.
 
@@ -14,12 +23,16 @@ database`, it may be used for any "source → target" data flow.
    :caption: Documentation
 
    narr/install
+   narr/cli
 
 .. toctree::
    :maxdepth: 1
    :caption: API
 
    api/wuttasync
+   api/wuttasync.cli
+   api/wuttasync.cli.base
+   api/wuttasync.cli.import_csv
    api/wuttasync.importing
    api/wuttasync.importing.base
    api/wuttasync.importing.csv