flite: add page (#8816)

pages/common/flite.md

@@ -0,0 +1,28 @@
+# flite
+
+> Speech synthesis engine.
+> More information: <http://www.festvox.org/flite/doc/>.
+
+- List all available voices:
+
+`flite -lv`
+
+- Convert a text string to speech:
+
+`flite -t "{{string}}"`
+
+- Convert the contents of a file to speech:
+
+`flite -f {{path/to/file.txt}}`
+
+- Specify which voice to use:
+
+`flite -voice {{file://path/to/filename.flitevox|url}}`
+
+- Store output into a wav file:
+
+`flite -voice {{file://path/to/filename.flitevox|url}} -f {{path/to/file.txt}} -o {{output.wav}}`
+
+- Display version:
+
+`flite --version`