Reduce output duplication and add install scripts

scripts/uninstall.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env sh
+set -eu
+
+INSTALL_DIR="${OPENSTOCK_INSTALL_DIR:-$HOME/.local/bin}"
+BIN_NAME="${OPENSTOCK_BIN_NAME:-openstock}"
+TARGET="$INSTALL_DIR/$BIN_NAME"
+
+if [ -e "$TARGET" ]; then
+  rm -f "$TARGET"
+  echo "removed: $TARGET"
+else
+  echo "not installed: $TARGET"
+fi
+
+echo "config and cache are preserved at: ${OPENSTOCK_CONFIG_DIR:-$HOME/.config/openstock}"
+echo "remove them manually only if you no longer need credentials or cached data."