utility, helper: add aliases to use with termux terminal emulator (android) (#1859)

modules/helper/init.zsh

@@ -49,3 +49,8 @@ function is-bsd {
 function is-cygwin {
   [[ "$OSTYPE" == cygwin* ]]
 }
+
+# is true on termux (Android)
+function is-termux {
+  [[ "$OSTYPE" == linux-android ]]
+}

modules/utility/init.zsh

@@ -140,6 +140,10 @@ elif is-cygwin; then
   alias o='cygstart'
   alias pbcopy='tee > /dev/clipboard'
   alias pbpaste='cat /dev/clipboard'
+elif is-termux; then
+  alias o='termux-open'
+  alias pbcopy='termux-clipboard-set'
+  alias pbpaste='termux-clipboard-get'
 else
   alias o='xdg-open'