Abstract away cache. 2 implementations: redis and memory

src/NadekoBot/creds_example.yml

@@ -1,5 +1,5 @@
 # DO NOT CHANGE
-version: 5
+version: 6
 # Bot token. Do not share with anyone ever -> https://discordapp.com/developers/applications/
 token: ''
 # List of Ids of the users who have bot owner permissions
@@ -9,6 +9,9 @@ ownerIds: []
 usePrivilegedIntents: true
 # The number of shards that the bot will be running on.
 # Leave at 1 if you don't know what you're doing.
+# 
+# note: If you are planning to have more than one shard, then you must change botCache to 'redis'.
+# Also, in that case you should be using NadekoBot.Coordinator to start the bot, and it will correctly override this value.
 totalShards: 1
 # Login to https://console.cloud.google.com, create a new project, go to APIs & Services -> Library -> YouTube Data API and enable it.
 # Then, go to APIs and Services -> Credentials and click Create credentials -> API key.
@@ -53,7 +56,12 @@ patreon:
 botListToken: ''
 # Official cleverbot api key.
 cleverbotApiKey: ''
+# Which cache implementation should bot use.
+# 'memory' - Cache will be in memory of the bot's process itself. Only use this on bots with a single shard. When the bot is restarted the cache is reset.
+# 'redis' - Uses redis (which needs to be separately downloaded and installed). The cache will persist through bot restarts. You can configure connection string in creds.yml
+botCache: Memory
 # Redis connection string. Don't change if you don't know what you're doing.
+# Only used if botCache is set to 'redis'
 redisOptions: localhost:6379,syncTimeout=30000,responseTimeout=30000,allowAdmin=true,password=
 # Database options. Don't change if you don't know what you're doing. Leave null for default values
 db:
@@ -99,7 +107,7 @@ twitchClientSecret:
 # args: "NadekoBot.dll -- {0}"
 # Windows default
 # cmd: NadekoBot.exe
-# args: {0}
+# args: "{0}"
 restartCommand:
   cmd: 
   args: