adding in h3 support

Author: PGMacDesign2

richeditor-compose/src/commonMain/kotlin/com/mohamedrejeb/richeditor/model/RichTextState.kt

@@ -75,6 +75,7 @@ import kotlin.math.max
 import kotlin.reflect.KClass
 import com.mohamedrejeb.richeditor.parser.utils.H1SpanStyle
 import com.mohamedrejeb.richeditor.parser.utils.H2SpanStyle
+import com.mohamedrejeb.richeditor.parser.utils.H3SpanStyle
 
 /**
  * rememberRichTextState - Creates and remembers a RichTextState instance with automatic state preservation.
@@ -300,6 +301,8 @@ public class RichTextState internal constructor(
         private set
     public var isH2: Boolean by mutableStateOf(false)
         private set
+    public var isH3: Boolean by mutableStateOf(false)
+        private set
 
     public val config: RichTextConfig = RichTextConfig(
         updateText = {
@@ -4376,5 +4379,7 @@ public class RichTextState internal constructor(
                currentStyle.fontWeight == H1SpanStyle.fontWeight
         isH2 = currentStyle.fontSize == H2SpanStyle.fontSize && 
                currentStyle.fontWeight == H2SpanStyle.fontWeight
+        isH3 = currentStyle.fontSize == H3SpanStyle.fontSize && 
+               currentStyle.fontWeight == H3SpanStyle.fontWeight
     }
 }

richeditor-compose/src/commonMain/kotlin/com/mohamedrejeb/richeditor/parser/lexical/RichTextStateLexicalParser.kt

@@ -13,6 +13,7 @@ import com.mohamedrejeb.richeditor.paragraph.type.*
 import com.mohamedrejeb.richeditor.parser.RichTextStateParser
 import com.mohamedrejeb.richeditor.parser.utils.H1SpanStyle
 import com.mohamedrejeb.richeditor.parser.utils.H2SpanStyle
+import com.mohamedrejeb.richeditor.parser.utils.H3SpanStyle
 import androidx.compose.ui.util.fastForEach
 
 internal object RichTextStateLexicalParser : RichTextStateParser<String> {
@@ -341,6 +342,7 @@ internal object RichTextStateLexicalParser : RichTextStateParser<String> {
                 val headingStyle = when (node.tag) {
                     "h1" -> H1SpanStyle
                     "h2" -> H2SpanStyle
+                    "h3" -> H3SpanStyle
                     else -> null
                 }
 
@@ -951,6 +953,9 @@ internal object RichTextStateLexicalParser : RichTextStateParser<String> {
                     spanStyle.fontSize == H2SpanStyle.fontSize && 
                     spanStyle.fontWeight == H2SpanStyle.fontWeight -> "h2"
 
+                    spanStyle.fontSize == H3SpanStyle.fontSize && 
+                    spanStyle.fontWeight == H3SpanStyle.fontWeight -> "h3"
+                    
                     else -> null
                 }
             }