chore(login): migrate nextjs login to monorepo (#10134)

# Which Problems Are Solved

We move the login code to the zitadel repo.

# How the Problems Are Solved

The login repo is added to ./login as a git subtree pulled from the
dockerize-ci branch.
Apart from the login code, this PR contains the changes from #10116

# Additional Context

- Closes https://github.com/zitadel/typescript/issues/474
- Also merges #10116  
- Merging is blocked by failing check because of:
- https://github.com/zitadel/zitadel/pull/10134#issuecomment-3012086106

---------

Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Max Peintner <[email protected]>
Co-authored-by: Florian Forster <[email protected]>

login/scripts/entrypoint.sh

@@ -0,0 +1,11 @@
+#!/bin/sh
+set -o allexport
+. /.env-file/.env
+set +o allexport
+
+if [ -n "${ZITADEL_SERVICE_USER_TOKEN_FILE}" ] && [ -f "${ZITADEL_SERVICE_USER_TOKEN_FILE}" ]; then
+  echo "ZITADEL_SERVICE_USER_TOKEN_FILE=${ZITADEL_SERVICE_USER_TOKEN_FILE} is set and file exists, setting ZITADEL_SERVICE_USER_TOKEN to the files content"
+  export ZITADEL_SERVICE_USER_TOKEN=$(cat "${ZITADEL_SERVICE_USER_TOKEN_FILE}")
+fi
+
+exec node apps/login/server.js

login/scripts/healthcheck.js

@@ -0,0 +1,14 @@
+const url = process.argv[2];
+
+if (!url) {
+    console.error("❌ No URL provided as command line argument.");
+    process.exit(1);
+}
+
+try {
+    const res = await fetch(url);
+    if (!res.ok) process.exit(1);
+    process.exit(0);
+} catch (e) {
+    process.exit(1);
+}

login/scripts/run_or_skip.sh

@@ -0,0 +1,67 @@
+#!/usr/bin/env bash
+
+# Usage: ./run_or_skip.sh <Make target> <images>
+# Example: ./run_or_skip.sh lint-force "img1;img2"
+
+set -euo pipefail
+
+if [ -z "$CACHE_DIR" ]; then
+    echo "CACHE_DIR is not set. Please set it to a valid directory."
+    exit 1
+fi
+
+MAKE_TARGET=$1
+IMAGES=$2
+IGNORE_RUN_CACHE=${IGNORE_RUN_CACHE:-false}
+
+CACHE_FILE="$CACHE_DIR/$MAKE_TARGET.digests"
+mkdir -p "$CACHE_DIR"
+
+get_image_creation_dates() {
+  local values=""
+	for img in $(echo "$IMAGES"); do
+		local value=$(docker image inspect "$img" --format='{{.Created}}' 2>/dev/null || true)
+		if [[ -z $value ]]; then
+		  docker pull "$img" >/dev/null 2>&1 || true
+		  value=$(docker image inspect "$img" --format='{{.Created}}' 2>/dev/null || true)
+    fi
+    if [[ -z $value ]]; then
+		  value=$(docker image inspect "$img" --format='{{.Created}}' 2>/dev/null || true)
+    fi
+		value=${value:-new-and-not-pullable-or-failed-to-build}
+		value="${img}@${value}"
+		values="${values}${value};"
+	done
+	values=${values%;}  # Remove trailing semicolon
+	echo "$values"
+}
+
+CACHE_FILE_CONTENT=$(cat "$CACHE_FILE" 2>/dev/null || echo "")
+CACHED_STATUS=$(echo "$CACHE_FILE_CONTENT" | cut -d ';' -f1)
+CACHED_IMAGE_CREATED_VALUES=$(echo "$CACHE_FILE_CONTENT" | cut -d ';' -f2-99)
+CURRENT_IMAGE_CREATED_VALUES="$(get_image_creation_dates)"
+  if [[ "$CACHED_IMAGE_CREATED_VALUES" == "$CURRENT_IMAGE_CREATED_VALUES" ]]; then
+    if [[ "$IGNORE_RUN_CACHE" == "true" ]]; then
+        echo "\$IGNORE_RUN_CACHE=$IGNORE_RUN_CACHE - Running $MAKE_TARGET despite unchanged images."
+    else
+        echo "Skipping $MAKE_TARGET – all images unchanged, returning cached status $CACHED_STATUS"
+        exit $CACHED_STATUS
+    fi
+fi
+echo "Images have changed"
+echo
+echo "CACHED_IMAGE_CREATED_VALUES does not match CURRENT_IMAGE_CREATED_VALUES"
+echo
+echo "$CACHED_IMAGE_CREATED_VALUES"
+echo
+echo "$CURRENT_IMAGE_CREATED_VALUES"
+echo
+docker images
+echo
+echo "Running $MAKE_TARGET..."
+set +e
+make -j $MAKE_TARGET
+STATUS=$?
+set -e
+echo "${STATUS};$(get_image_creation_dates)" > $CACHE_FILE
+exit $STATUS