feat(comicinfo): add date fields to comic info (#1021)

* feat(comicinfo): add date fields to comic info

This will be parsed by Komga, Kavita etc ... and any other library management to also have the date of the chapter.

* refactor: improve code readability

Co-authored-by: Mitchell Syer <Syer10@users.noreply.github.com>

---------

Co-authored-by: Mitchell Syer <Syer10@users.noreply.github.com>

server/src/main/kotlin/eu/kanade/tachiyomi/source/local/metadata/ComicInfo.kt

@@ -58,6 +58,9 @@ data class ComicInfo(
     val web: Web?,
     val publishingStatus: PublishingStatusTachiyomi?,
     val categories: CategoriesTachiyomi?,
+    val day: Day?,
+    val month: Month?,
+    val year: Year?,
 ) {
     @Suppress("UNUSED")
     @XmlElement(false)
@@ -87,6 +90,24 @@ data class ComicInfo(
         @XmlValue(true) val value: String = "",
     )
 
+    @Serializable
+    @XmlSerialName("Day", "", "")
+    data class Day(
+        @XmlValue(true) val value: Int = 0,
+    )
+
+    @Serializable
+    @XmlSerialName("Month", "", "")
+    data class Month(
+        @XmlValue(true) val value: Int = 0,
+    )
+
+    @Serializable
+    @XmlSerialName("Year", "", "")
+    data class Year(
+        @XmlValue(true) val value: Int = 0,
+    )
+
     @Serializable
     @XmlSerialName("Summary", "", "")
     data class Summary(