chronic, combine, ifdata, ifne, isutf8: add pages (#12114)

* chronic, combine, ifdata, ifne, isutf8: add pages

---------

Co-authored-by: Vitor Henrique <87824454+vitorhcl@users.noreply.github.com>

pages/common/chronic.md

@@ -0,0 +1,16 @@
+# chronic
+
+> Display `stdout` and `stderr` of a command if and only if it fails.
+> More information: <https://joeyh.name/code/moreutils/>.
+
+- Display `stdout` and `stderr` of the specified command if and only if it produces a non-zero exit code or crashes:
+
+`chronic {{command options ...}}`
+
+- Display `stdout` and `stderr` of the specified command if and only if it produces a non-empty `stderr`:
+
+`chronic -e {{command options ...}}`
+
+- Enable [v]erbose mode:
+
+`chronic -v {{command options ...}}`