added starboard functionality (starboard/starstats)

added module to store/retrieve configuration (double and string values)
replaced a few null values with optionals (emote loading)
fixed creating channels on startup
added delete message/get emote utility to bot service
extended emote service to have utility methods to use emotes
added reactions to message cache
added empty message handling to  post target service, in case the template evaluates to empty
added ability to edit a message in a post target (standard message and embed)
added principle of config listeners, so default config can be created, for example starboard thresholds
added abstract reaction listeners for adding/removing/clearing
fixed foreign keys between channel and server
added emote utils to handle AEmote and Emotes
renamed emotes to be camelCase, so they are easier to type

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/templates/commands/starStats/starStats_description_en_US.ftl

@@ -0,0 +1 @@
+Shows the current leaderboard of starboard posts.

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/templates/commands/starStats/starStats_long_help_en_US.ftl

@@ -0,0 +1 @@
+Shows the current leaderboard of starboard posts.

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/templates/commands/starStats/starStats_response_embed_en_US.ftl

@@ -0,0 +1,51 @@
+{
+  "title": {
+    "title": "Server starboard stats"
+  },
+  "color" : {
+    "r": 200,
+    "g": 0,
+    "b": 255
+  },
+  "description": "${starredMessages} starred messages with ${totalStars} stars in total",
+  "fields": [
+      {
+            "name": "Top starred posts",
+            "value": "
+                <#list topPosts as post>
+                    ${badgeEmotes[post?index]} - ${post.starCount} :star: [Jump!](${post.messageUrl})
+                <#else>
+                    No starred messages.
+                </#list>
+            "
+      },
+      {
+            "name": "Top starrer",
+            "value": "
+                <#list starGiver as starrer>
+                    <#if starrer.member?has_content>
+                        ${badgeEmotes[starrer?index]} - ${starrer.starCount} :star: ${starrer.member.asMention}
+                    <#else>
+                        ${badgeEmotes[starrer?index]} - ${starrer.starCount} :star: ${starrer.user.id?c} (Left the guild)
+                    </#if>
+                 <#else>
+                    No starred messages.
+                </#list>
+            "
+      },
+     {
+             "name": "Top star receiver",
+             "value": "
+                <#list starReceiver as starred>
+                    <#if starred.member?has_content>
+                        ${badgeEmotes[starred?index]} - ${starred.starCount} :star: ${starred.member.asMention}
+                    <#else>
+                        ${badgeEmotes[starred?index]} - ${starred.starCount} :star: ${starred.user.id?c} (Left the guild)
+                    </#if>
+                <#else>
+                  No starred messages.
+                </#list>
+             "
+     }
+  ]
+}

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/templates/commands/starStats/starStats_usage_en_US.ftl

@@ -0,0 +1 @@
+starStats

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/templates/listener/starboard/starboard_post_embed_en_US.ftl

@@ -0,0 +1,44 @@
+{
+  "author": {
+  <#if author?has_content>
+    "name": "${author.effectiveName}",
+    "avatar": "${author.user.effectiveAvatarUrl}"
+  <#else>
+    "name": "${user.id?c} (Has left the server)"
+  </#if>
+  },
+  "color" : {
+    "r": 200,
+    "g": 0,
+    "b": 255
+  },
+  <#if message.content?has_content || message.embeds?size gt 0>
+   "description": "${message.content}
+   <#list message.embeds>
+        Embeds:
+        <#items as embed>
+            Description: ${embed.description} <#if embed.imageUrl?has_content> ImageUrl: ${embed.imageUrl} </#if>
+        </#items>
+   </#list>
+   ",
+  </#if>
+  <#if channel?has_content>
+  "additionalMessage": "${starLevelEmote} ${starCount} ${channel.asMention} ID: ${message.messageId?c}",
+  <#else>
+  "additionalMessage": "${starLevelEmote} ${starCount} ${aChannel.id?c} ID: ${message.messageId?c}",
+  </#if>
+  <#if message.attachmentUrls?size gt 0>
+  "imageUrl": "${message.attachmentUrls[0]}",
+  </#if>
+  "fields": [
+    {
+      "name": "Original",
+      <#if channel?has_content>
+      "value": "[${channel.name}](${message.messageUrl})"
+      <#else>
+      "value": "[${aChannel.id?c}](${message.messageUrl})"
+      </#if>
+    }
+  ],
+  "timeStamp": "${message.timeCreated}"
+}

abstracto-application/abstracto-modules/utility/utility-impl/src/main/resources/utility.properties

@@ -1,8 +1,16 @@
-abstracto.postTargets.utility=suggestions
-abstracto.emoteNames.suggestion=SUGGESTION_YES,SUGGESTION_NO
+abstracto.postTargets.utility=suggestions,starboard
+abstracto.emoteNames.suggestion=suggestionYes,suggestionNo
+abstracto.emoteNames.starboard=star,star1,star2,star3,star4,starboardBadge1,starboardBadge2,starboardBadge3
+abstracto.starboard.lvl[0]=5
+abstracto.starboard.lvl[1]=8
+abstracto.starboard.lvl[2]=13
+abstracto.starboard.lvl[3]=17
+abstracto.starboard.badge[0]=\ud83e\udd47
+abstracto.starboard.badge[1]=\ud83e\udd48
+abstracto.starboard.badge[2]=\ud83e\udd49
 
 abstracto.scheduling.jobs.reminderJob.name=reminderJob
 abstracto.scheduling.jobs.reminderJob.group=utility
 abstracto.scheduling.jobs.reminderJob.clazz=dev.sheldan.abstracto.utility.jobs.ReminderJob
 abstracto.scheduling.jobs.reminderJob.standAlone=false
-abstracto.scheduling.jobs.reminderJob.active=true
+abstracto.scheduling.jobs.reminderJob.active=true