[wiki/MUTN] Add basic building/installation instructions

completions/completion.zsh

@@ -0,0 +1,31 @@
+#compdef mutn
+
+mutnPath="$HOME/.local/share/libmutton"
+fullPaths=("$mutnPath"/**/*)
+trimmedPaths=()
+for scanPath in "${fullPaths[@]}"; do
+  # exclude directories
+  [ -f "$scanPath" ] && trimmedPaths+=("${scanPath#$mutnPath}")
+done
+[[ -z $trimmedPaths ]] && trimmedPaths=(help)
+
+case ${words[-2]} in
+  mutn )
+    compadd $trimmedPaths
+    ;;
+  /* )
+    compadd {copy,edit,gen,add,shear}
+    ;;
+  add )
+    compadd {password,note,folder}
+    ;;
+  copy )
+    compadd {password,username,totp,url,note}
+    ;;
+  edit )
+    compadd {password,username,totp,url,note,rename}
+    ;;
+  gen )
+    compadd update
+    ;;
+esac