feat(command-not-found): add support for Termux (#9666)

plugins/command-not-found/README.md

@@ -28,5 +28,6 @@ It works out of the box with the command-not-found packages for:
 - [macOS (Homebrew)](https://github.com/Homebrew/homebrew-command-not-found)
 - [Fedora](https://fedoraproject.org/wiki/Features/PackageKitCommandNotFound)
 - [NixOS](https://github.com/NixOS/nixpkgs/tree/master/nixos/modules/programs/command-not-found)
+- [Termux](https://github.com/termux/command-not-found)
 
 You can add support for other platforms by submitting a Pull Request.

plugins/command-not-found/command-not-found.plugin.zsh

@@ -53,3 +53,10 @@ if [[ -x /run/current-system/sw/bin/command-not-found ]]; then
     /run/current-system/sw/bin/command-not-found -- "$@"
   }
 fi
+
+# Termux: https://github.com/termux/command-not-found
+if [[ -x /data/data/com.termux/files/usr/libexec/termux/command-not-found ]]; then
+  command_not_found_handler() {
+    /data/data/com.termux/files/usr/libexec/termux/command-not-found -- "$1"
+  }
+fi