feat: page, hash and rootline caches in Redis again, as on TYPO3 10

Since every page view goes through TYPO3 13, the page cache is on the hot
path; TYPO3 10 kept it in Redis, TYPO3 13 had it in MySQL. Same socket and
options as TYPO3 10, but databases 3-5 instead of 0-2, which may still
hold TYPO3 10 entries in a format TYPO3 13 must not read. DDEV gets the
redis add-on for the same setup locally.

Without a Redis connection the backend logs an alert and misses, so pages
still render (slower); a missing PHP redis extension, however, fails hard.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

.ddev/commands/redis/redis-cli

@@ -0,0 +1,13 @@
+#!/usr/bin/env sh
+
+#ddev-generated
+## Description: Run redis-cli inside the Redis container
+## Usage: redis-cli [flags] [args]
+## Example: "ddev redis-cli KEYS *" or "ddev redis-cli INFO" or "ddev redis-cli --version"
+## Aliases: redis
+
+if [ -f /etc/redis/conf/security.conf ]; then
+  redis-cli -p 6379 -h "${REDIS_HOSTNAME:-redis}" -a redis --no-auth-warning $@
+else
+  redis-cli -p 6379 -h "${REDIS_HOSTNAME:-redis}" $@
+fi