Add bitcoin icon to bitcoin hashtags

Changelog-Added: Add bitcoin icon to bitcoin hashtags

damus/Util/CompatibleAttribute.swift

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+//
+//  CompatibleAttribute.swift
+//  damus
+//
+//  Created by William Casarin on 2023-04-06.
+//
+
+import Foundation
+import SwiftUI
+
+class CompatibleText: Equatable {
+    var text: Text
+    var attributed: AttributedString
+    
+    init() {
+        self.text = Text("")
+        self.attributed = AttributedString(stringLiteral: "")
+    }
+    
+    init(stringLiteral: String) {
+        self.text = Text(stringLiteral)
+        self.attributed = AttributedString(stringLiteral: stringLiteral)
+    }
+    
+    init(text: Text, attributed: AttributedString) {
+        self.text = text
+        self.attributed = attributed
+    }
+    
+    init(attributed: AttributedString) {
+        self.text = Text(attributed)
+        self.attributed = attributed
+    }
+    
+    static func == (lhs: CompatibleText, rhs: CompatibleText) -> Bool {
+        return lhs.attributed == rhs.attributed
+    }
+    
+    static func +(lhs: CompatibleText, rhs: CompatibleText) -> CompatibleText {
+        let combinedText = lhs.text + rhs.text
+        let combinedAttributes = lhs.attributed + rhs.attributed
+        return CompatibleText(text: combinedText, attributed: combinedAttributes)
+    }
+}