Add plugin for finch

plugins/finch/README.md

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+# Finch plugin
+
+This plugin adds auto-completion and aliases for [finch](https://runfinch.com/).
+
+To use it add `finch` to the plugins array in your zshrc file.
+
+```zsh
+plugins=(... finch)
+```
+
+## Aliases
+
+| Alias   | Command     | Description                                       |
+| :------ | :---------- |  :----------------------------------------------- |
+| fvm     | `finch vm`  | Operate on the Virtual Machine container runtime  |

plugins/finch/finch.plugin.zsh

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+if (( ! $+commands[finch] )); then
+  return
+fi
+
+# If the completion file doesn't exist yet, we need to autoload it and
+# bind it to `finch`. Otherwise, compinit will have already done that.
+if [[ ! -f "$ZSH_CACHE_DIR/completions/_finch" ]]; then
+  typeset -g -A _comps
+  autoload -Uz _finch
+  _comps[finch]=_finch
+fi
+
+finch completion zsh 2> /dev/null >| "$ZSH_CACHE_DIR/completions/_finch" &|
+
+alias fvm='finch vm'