joe: add page (#7198)

pages/common/joe.md

@@ -0,0 +1,20 @@
+# joe
+
+> Joe's own text editor.
+> More information: <https://joe-editor.sourceforge.io>.
+
+- Open a new file in JOE:
+
+`joe`
+
+- Open a specific file:
+
+`joe {{path/to/file}}`
+
+- Open a specific file, positioning the cursor at the specified line:
+
+`joe +{{line}} {{path/to/file}}`
+
+- Open a specific file in read-only mode:
+
+`joe -rdonly {{path/to/file}}`