Add label to privately installed extensions (#2349)

Just adds the same word as the install option ("Private" in English)
next to the extension version and 18+ label.

(cherry picked from commit 549d74a2c9aef0eb41ea18378cd29d4ab9eee2b4)

app/src/main/java/eu/kanade/presentation/browse/ExtensionsScreen.kt

@@ -351,13 +351,17 @@ private fun ExtensionItemContent(
             horizontalArrangement = Arrangement.spacedBy(MaterialTheme.padding.extraSmall),
         ) {
             ProvideTextStyle(value = MaterialTheme.typography.bodySmall) {
+                var hasAlreadyShownAnElement by remember { mutableStateOf(false) }
                 if (extension is Extension.Installed && extension.lang.isNotEmpty()) {
+                    hasAlreadyShownAnElement = true
                     Text(
                         text = LocaleHelper.getSourceDisplayName(extension.lang, LocalContext.current),
                     )
                 }
 
                 if (extension.versionName.isNotEmpty()) {
+                    if (hasAlreadyShownAnElement) DotSeparatorNoSpaceText()
+                    hasAlreadyShownAnElement = true
                     Text(
                         text = extension.versionName,
                     )
@@ -373,6 +377,8 @@ private fun ExtensionItemContent(
                     else -> null
                 }
                 if (warning != null) {
+                    if (hasAlreadyShownAnElement) DotSeparatorNoSpaceText()
+                    hasAlreadyShownAnElement = true
                     Text(
                         text = stringResource(warning).uppercase(),
                         color = MaterialTheme.colorScheme.error,
@@ -380,6 +386,12 @@ private fun ExtensionItemContent(
                         overflow = TextOverflow.Ellipsis,
                     )
                 }
+                if (extension is Extension.Installed && !extension.isShared) {
+                    if (hasAlreadyShownAnElement) DotSeparatorNoSpaceText()
+                    Text(
+                        text = stringResource(MR.strings.ext_installer_private),
+                    )
+                }
 
                 if (!installStep.isCompleted()) {
                     DotSeparatorNoSpaceText()