navi: add page (#12347)

* navi: add page

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

pages/linux/navi.md

@@ -0,0 +1,24 @@
+# navi
+
+> An interactive cheatsheet tool for the command line and application launchers.
+> More information: <https://github.com/denisidoro/navi>.
+
+- Browse through all available cheatsheets:
+
+`navi`
+
+- Browse the cheatsheet for `navi` itself:
+
+`navi fn welcome`
+
+- Print a command from the cheatsheet without executing it:
+
+`navi --print`
+
+- Output shell widget source code (It automatically detects your shell if possible, but can also be specified manually):
+
+`navi widget {{shell}}`
+
+- Autoselect and execute the snippet that best matches a query:
+
+`navi --query '{{query}}' --best-match`