feat: allow to use redis cache instead of memory cache (#832)

* feat(backend/cache): allow to use redis cache instead as memory

* feat(frontend/admin): add cache section

Add a new section for cache attributes. Also add US translation.

---------

Co-authored-by: Jules Lefebvre <jules.lefebvre@diabolocom.com>

frontend/src/i18n/translations/en-US.ts

@@ -423,6 +423,7 @@ export default {
   "admin.config.title": "Configuration",
   "admin.config.category.general": "General",
   "admin.config.category.share": "Share",
+  "admin.config.category.cache": "Cache",
   "admin.config.category.email": "Email",
   "admin.config.category.smtp": "SMTP",
   "admin.config.category.oauth": "Social Login",
@@ -446,6 +447,19 @@ export default {
     "Change your logo by uploading a new image. The image must be a PNG and should have the format 1:1.",
   "admin.config.general.logo.placeholder": "Pick image",
 
+  "admin.config.cache.ttl": "TTL",
+  "admin.config.cache.ttl.description":
+    "Time in second to keep information inside the cache.",
+  "admin.config.cache.max-items": "Maximum items",
+  "admin.config.cache.max-items.description":
+    "Maximum number of items inside the cache.",
+  "admin.config.cache.redis-enabled": "Redis enabled",
+  "admin.config.cache.redis-enabled.description":
+    "Normally Pingvin Share caches information in memory. If you run multiple instances of Pingvin Share, you need to enable Redis caching to share the cache between the instances.",
+  "admin.config.cache.redis-url": "Redis URL",
+  "admin.config.cache.redis-url.description":
+    "Url to connect to the Redis instance used for caching.",
+
   "admin.config.email.enable-share-email-recipients":
     "Enable email recipient sharing",
   "admin.config.email.enable-share-email-recipients.description":