Pin WNDB fixture line endings so Windows checkout doesn't corrupt them

WNDB data lines embed their own byte offset, which WndbReader validates
against the actual position. The repo's default `* text=auto` lets Git
normalize these fixtures to CRLF on Windows checkout, inserting a CR
before every LF and shifting every offset after the first line; every
WndbReaderTest case failed on Windows CI as a result. Scoping -text to
the fixture directory keeps the checkout byte-identical everywhere.

Author: krickert

opennlp-extensions/opennlp-wordnet/src/test/resources/opennlp/wordnet/mini-wndb/.gitattributes

@@ -0,0 +1,7 @@
+# WNDB is a byte-offset format: each data line embeds its own byte position in the
+# file, and WndbReader validates that offset against the actual position. Line-ending
+# normalization on checkout (the repo root's `* text=auto`) would insert a CR before
+# every LF on Windows, shifting every offset after the first line and breaking every
+# fixture that has more than one line. Disable it here so checkout is byte-identical
+# on every platform.
+* -text