hunspell: add page (#4842)

pages/common/hunspell.md

@@ -0,0 +1,16 @@
+# hunspell
+
+> Check spelling.
+> More information: <https://hunspell.github.io/>.
+
+- Check the spelling of a file:
+
+`hunspell {{path/to/file}}`
+
+- Check the spelling of a file with the en_US dictionary:
+
+`hunspell -d {{en_US}} {{path/to/file}}`
+
+- List misspelled words in a file:
+
+`hunspell -l {{path/to/file}}`