Document cudf.read_text and cudf.read_avro. (#10638)

This adds documentation for `cudf.read_text` and `cudf.read_avro`.

Authors:
  - Bradley Dice (https://github.com/bdice)

Approvers:
  - GALI PREM SAGAR (https://github.com/galipremsagar)
  - Vukasin Milovanovic (https://github.com/vuule)

URL: #10638

docs/cudf/source/api_docs/io.rst

@@ -13,6 +13,12 @@ CSV
    read_csv
    DataFrame.to_csv
 
+Text
+~~~~
+.. autosummary::
+   :toctree: api/
+
+   read_text
 
 .. currentmodule:: cudf.io.json
 
@@ -43,8 +49,6 @@ ORC
    read_orc
    DataFrame.to_orc
 
-.. currentmodule:: cudf
-
 HDFStore: PyTables (HDF5)
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 .. autosummary::
@@ -71,3 +75,9 @@ Feather
    Feather reader and writers are not GPU accelerated. These currently use CPU via Pandas.
    This may be GPU accelerated in the future.
 
+Avro
+~~~~
+.. autosummary::
+   :toctree: api/
+
+   read_avro

python/cudf/cudf/utils/ioutils.py

@@ -77,11 +77,6 @@
 0       10   hello
 1       20  rapids
 2       30      ai
-
-See Also
---------
-cudf.read_csv
-cudf.read_json
 """.format(
     remote_data_sources=_docstring_remote_sources
 )