zsh: Add bash-like alt-dot hotkey

Allows pressing <alt-.> when in insertion mode in zsh to add the first
(then second, third, ...) argument from the last line to the end of the
current line.

Especially useful for things like:

```
mkdir -p my/folder/deeply nested
cd <alt-.>
```

to instantly move to the folder!

zsh/.config/zsh/.zshrc

@@ -143,6 +143,10 @@ bindkey " " globalias
 bindkey "^ " magic-space           # control-space to bypass completion
 bindkey -M isearch " " magic-space # normal space during searches
 
+# allow inserting previous arguments in the current zle input
+# see https://stackoverflow.com/a/34861762
+bindkey "^[." insert-last-word
+
 # VIM MODE for the shell
 # enable vim mode on pressing escape
 bindkey -v