zsh: add fuzzyman command for fuzzy search of man pages (with preview)

functions/man.zsh

@@ -0,0 +1,19 @@
+function fuzzyman() {
+  local preview_cmd
+  preview_cmd='command man {+1} 2>/dev/null | bat --style=plain --language=man --color=always'
+
+  apropos_args=$@
+  if [[ -z $apropos_args ]]; then
+      apropos_args="."
+  fi
+
+  man $(command man -k "${apropos_args}" \
+      | fzf \
+          --preview="${preview_cmd}" \
+          --preview-window=right,60% \
+      | awk '{print $1}'
+  )
+
+}
+
+compdef _man fuzzyman=man