feat(plugins): add plugin for deno (#9847)

Co-authored-by: Kapil Pau <kapilpau@hotmail.com>
Co-authored-by: CallMeLaNN <CallMeLaNN@users.noreply.github.com>

plugins/deno/.gitignore

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+_deno

plugins/deno/README.md

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+# Deno Plugin
+
+This plugin sets up completion and aliases for [Deno](https://deno.land).
+
+## Aliases
+
+| Alias | Full command     |
+| ----- | ---------------- |
+| db    | deno bundle      |
+| dc    | deno compile     |
+| dca   | deno cache       |
+| dfmt  | deno fmt         |
+| dh    | deno help        |
+| dli   | deno lint        |
+| drn   | deno run         |
+| drw   | deno run --watch |
+| dts   | deno test        |
+| dup   | deno upgrade     |

plugins/deno/deno.plugin.zsh

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+# ALIASES
+alias db='deno bundle'
+alias dc='deno compile'
+alias dca='deno cache'
+alias dfmt='deno fmt'
+alias dh='deno help'
+alias dli='deno lint'
+alias drn='deno run'
+alias drw='deno run --watch'
+alias dts='deno test'
+alias dup='deno upgrade'
+
+# COMPLETION FUNCTION
+if (( $+commands[deno] )); then
+  if [[ ! -f $ZSH_CACHE_DIR/deno_version ]] \
+    || [[ "$(deno --version)" != "$(< "$ZSH_CACHE_DIR/deno_version")" ]] \
+    || [[ ! -f $ZSH/plugins/deno/_deno ]]; then
+    deno completions zsh > $ZSH/plugins/deno/_deno
+    deno --version > $ZSH_CACHE_DIR/deno_version
+  fi
+fi