feat(foot): add foot plugin (#12849)

plugins/foot/README.md

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+# foot
+
+This plugin adds shell integration for [foot, a fast, lightweight and
+minimalistic Wayland terminal emulator](https://codeberg.org/dnkl/foot).
+
+To use, add `foot` to the list of plugins in your `.zshrc` file:
+
+```zsh
+plugins=(... foot)
+```
+
+## Spawning new terminal instances in the current working directory
+
+When spawning a new terminal instance (with `ctrl+shift+n` by default), the new
+instance will start in the current working directory.
+
+## Jumping between prompts
+
+Foot can move the current viewport to focus prompts of already executed
+commands (bound to ctrl+shift+z/x by default).
+
+## Piping last command's output
+
+The key binding `pipe-command-output` can pipe the last command's output to an
+application of your choice (similar to the other `pipe-*` key bindings):
+
+```
+[key-bindings]
+pipe-command-output=[sh -c "f=$(mktemp); cat - > $f; footclient emacsclient -nw $f; rm $f"] Control+Shift+g
+```
+
+When pressing ctrl+shift+g, the last command's output is written to a
+temporary file, then an emacsclient is started in a new footclient instance.
+The temporary file is removed after the footclient instance has closed.
+

plugins/foot/foot.plugin.zsh

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+function precmd {
+  print -Pn "\e]133;A\e\\"
+  if ! builtin zle; then
+    print -n "\e]133;D\e\\"
+  fi
+}
+
+function preexec {
+  print -n "\e]133;C\e\\"
+}