feat: add RelayUrlSegment for ws:// and wss:// relay URIs

Adds a new RelayUrlSegment type to RichTextParser that detects and
labels relay URIs (ws:// and wss:// schemes) as a distinct segment
type, separate from generic LinkSegments.

https://claude.ai/code/session_01U21sGdEEMLo4hY8dwxNzPr

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/richtext/RichTextParser.kt

@@ -245,6 +245,8 @@ class RichTextParser {
 
         if (videos.contains(word)) return VideoSegment(word)
 
+        if (word.startsWith("ws://", ignoreCase = true) || word.startsWith("wss://", ignoreCase = true)) return RelayUrlSegment(word)
+
         if (urls.contains(word)) return LinkSegment(word)
 
         if (CustomEmoji.fastMightContainEmoji(word, emojis) && emojis.any { word.contains(it.key) }) return EmojiSegment(word)

commons/src/commonMain/kotlin/com/vitorpamplona/amethyst/commons/richtext/RichTextParserSegments.kt

@@ -146,6 +146,11 @@ class SchemelessUrlSegment(
     val extras: String?,
 ) : Segment(segment)
 
+@Immutable
+class RelayUrlSegment(
+    segment: String,
+) : Segment(segment)
+
 @Immutable
 class RegularTextSegment(
     segment: String,