sh: Add fuzzy ripgrep-all search

Added function to fuzzily search through any documents using rga.
Function code adapted from https://github.com/phiresky/ripgrep-all

Can be interactively searched, should be reasonably fast once indexing
is finished.

sh/.config/sh/alias

@@ -53,6 +53,20 @@ if exist fzf; then
     # Fuzzy uninstall packages
     alias fzfyayrns="yay -Qeq | fzf -m --preview 'yay -Qi {1}' | xargs -ro yay -Rns"
   fi
+
+  # ripgrep-all to fzf search through any documents
+  if exist rga; then
+    rgafzf() {
+      RG_PREFIX="rga --files-with-matches"
+      xdg-open "$(
+        FZF_DEFAULT_COMMAND="$RG_PREFIX '$1'" \
+          fzf --sort --preview="[[ ! -z {} ]] && rga --pretty --context 5 {q} {}" \
+          --phony -q "$1" \
+          --bind "change:reload:$RG_PREFIX {q}" \
+          --preview-window="70%:wrap"
+      )"
+    }
+  fi
 fi
 
 # vifm