Add 'f' function

Adds 'f' function as a wrapper around 'fin' (the Docksal CLI) and removes the previous alias.

tag-zsh/zsh/functions/f

@@ -0,0 +1,9 @@
+# No arguments: `fin ps`
+# With arguments: acts like `fin`
+f() {
+  if [[ $# > 0 ]]; then
+    fin $@
+  else
+    fin ps
+  fi
+}