Add csv data dict extract to docs

docs/vlmd/extract/csvdd.md

@@ -0,0 +1,14 @@
+# `csv` (Minimal) Data Dictionary
+
+
+A minimal data dictionary in a csv (or tsv file). For example, may have `name`, `type`, and description and then this adds the rest of the fields. 
+
+> Also maps a few common data types (such as char, character,text to 'string' and 'float' to 'number'.)
+
+## Run the `vlmd` command
+
+=== "CLI"
+
+```bash
+vlmd extract --inputtype csv-data-dict data/minimal-csv-dd.csv
+```

docs/vlmd/extract/index.md

@@ -4,7 +4,7 @@ The healdata-utils variable-level metadata (vlmd) tool inputs a variety of diffe
 
 !!! warning 
 
-    Currently the python subcommand is `convert` but will be changed to `extract_to_vlmd` to be
+    Currently the python subcommand is `convert_to_vlmd` but will be changed to `extract_to_vlmd` to be
     consistent with CLI. `extract` was chosen to better reflect the functionality.
 
 
@@ -50,6 +50,7 @@ This section provides the specific syntax for running each of the supported type
 Extract variable level metadata from your data:
 
 - [CSV datasets](./csvdata.md)
+- [CSV (minimal) data dictionary](./csvdd.md)
 - [SPSS datasets](./spss.md)
 - [SAS datasets](./sas.md)
 - [Stata datasets](./stata.md)