improve preview cards (#4782)

- new design thats more Material3-ish
- support for the Mastodon 4.3 fediverse:creator feature and other new
card attributes

closes #4732 
closes https://github.com/tuskyapp/Tusky/issues/3340

before:

<img
src="https://github.com/user-attachments/assets/6cd9ccfc-7f7d-459b-90d9-547cdca0d8c4"
width="280"/>
<img
src="https://github.com/user-attachments/assets/286b5b19-49a3-4b2f-97a9-185fc1f31a8e"
width="280"/>


after:
<img
src="https://github.com/user-attachments/assets/b57acf74-e7d3-411e-9186-763de87fa9ca"
width="280"/> <img
src="https://github.com/user-attachments/assets/50684c30-b4bf-4f05-8b8e-e5fd2bf3d7b6"
width="280"/>

app/src/main/java/com/keylesspalace/tusky/entity/PreviewCard.kt

@@ -17,13 +17,17 @@ package com.keylesspalace.tusky.entity
 
 import com.squareup.moshi.Json
 import com.squareup.moshi.JsonClass
+import java.util.Date
 
 @JsonClass(generateAdapter = true)
-data class Card(
+data class PreviewCard(
     val url: String,
     val title: String,
     val description: String = "",
-    @Json(name = "author_name") val authorName: String = "",
+    val authors: List<PreviewCardAuthor> = emptyList(),
+    @Json(name = "author_name") val authorName: String? = null,
+    @Json(name = "provider_name") val providerName: String? = null,
+    @Json(name = "published_at") val publishedAt: Date?,
     val image: String? = null,
     val type: String,
     val width: Int = 0,
@@ -35,7 +39,7 @@ data class Card(
     override fun hashCode() = url.hashCode()
 
     override fun equals(other: Any?): Boolean {
-        if (other !is Card) {
+        if (other !is PreviewCard) {
             return false
         }
         return other.url == this.url
@@ -45,3 +49,10 @@ data class Card(
         const val TYPE_PHOTO = "photo"
     }
 }
+
+@JsonClass(generateAdapter = true)
+data class PreviewCardAuthor(
+    val name: String,
+    val url: String,
+    val account: TimelineAccount?
+)

app/src/main/java/com/keylesspalace/tusky/entity/Status.kt

@@ -53,7 +53,7 @@ data class Status(
     val muted: Boolean = false,
     val poll: Poll? = null,
     /** Preview card for links included within status content. */
-    val card: Card? = null,
+    val card: PreviewCard? = null,
     /** ISO 639 language code for this status. */
     val language: String? = null,
     /** If the current token has an authorized user: The filter and keywords that matched this status.