added some utility methods to bot service

reworked message cache to not be jda messages, but own objects: cachedMessages, jda messages should not be kept around
added listener to listen for message links, to represent them in an embed (or embeds)
added offsetDateTime handling for gson
introduced a way on how to handle async transaction handling for suggestions and message loading (self reference with another method with transactional)
added timestamp support to embeds

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedAuthor.java

@@ -0,0 +1,13 @@
+package dev.sheldan.abstracto.templating.embed;
+
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class EmbedAuthor {
+    private String name;
+    private String url;
+    private String avatar;
+}

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedColor.java

@@ -0,0 +1,12 @@
+package dev.sheldan.abstracto.templating.embed;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Setter
+@Getter
+public class EmbedColor {
+    private Integer r;
+    private Integer g;
+    private Integer b;
+}

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedConfiguration.java

@@ -0,0 +1,21 @@
+package dev.sheldan.abstracto.templating.embed;
+
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.OffsetDateTime;
+import java.util.List;
+
+@Getter
+@Setter
+public class EmbedConfiguration {
+    private EmbedAuthor author;
+    private EmbedTitle title;
+    private EmbedColor color;
+    private String description;
+    private String thumbnail;
+    private String imageUrl;
+    private List<EmbedField> fields;
+    private EmbedFooter footer;
+    private OffsetDateTime timeStamp;
+}

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedField.java

@@ -0,0 +1,12 @@
+package dev.sheldan.abstracto.templating.embed;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class EmbedField {
+    private String name;
+    private String value;
+    private Boolean inline;
+}

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedFooter.java

@@ -0,0 +1,11 @@
+package dev.sheldan.abstracto.templating.embed;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class EmbedFooter {
+    private String text;
+    private String icon;
+}

abstracto-application/templating/templating-interface/src/main/java/dev/sheldan/abstracto/templating/embed/EmbedTitle.java

@@ -0,0 +1,11 @@
+package dev.sheldan.abstracto.templating.embed;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class EmbedTitle {
+    private String title;
+    private String url;
+}