Refactor: Update string resources in ChannelSideDrawer for improved localization

This commit enhances the ChannelSideDrawer component by replacing hardcoded strings with string resources, improving localization support and maintainability.

- Updated content description for empty messages image.
- Replaced static text with string resources for empty messages heading and body.
- Updated text for the new conversation button to use string resources.

app/src/main/java/chat/revolt/composables/screens/chat/drawer/ChannelSideDrawer.kt

@@ -724,18 +724,18 @@ private fun ColumnScope.DirectMessagesChannelListRenderer(
                     Image(
                         modifier = Modifier.size(100.dp),
                         painter = painterResource(R.drawable.empty_direct_messages_img),
-                        contentDescription = "Empty Messages Sad Image"
+                        contentDescription = stringResource(R.string.empty_messages_content_description)
                     )
                     Spacer(Modifier.height(4.dp))
                     Text(
-                        text = "It’s Quiet Here...",
+                        text = stringResource(R.string.empty_messages_heading),
                         style = MaterialTheme.typography.labelLarge,
                         textAlign = TextAlign.Center,
                         fontSize = 24.sp
                     )
                     Spacer(Modifier.height(4.dp))
                     Text(
-                        text = "Find friends to chat with or create a group conversation.",
+                        text = stringResource(R.string.empty_messages_body),
                         style = MaterialTheme.typography.bodyMedium,
                         textAlign = TextAlign.Center
                     )
@@ -751,7 +751,7 @@ private fun ColumnScope.DirectMessagesChannelListRenderer(
                             bottomEnd = CornerSize(8.dp)
                         )
                     ) {
-                        Text(text = "New Conversation")
+                        Text(text = stringResource(R.string.new_conversation))
                     }
                 }
             }

app/src/main/res/values/strings.xml

@@ -17,6 +17,10 @@
     <string name="privacy_policy">Privacy Policy</string>
     <string name="community_guidelines">Community Guidelines</string>
     <string name="message_friends">Message Friends</string>
+    <string name="empty_messages_content_description">Empty Messages Sad Image</string>
+    <string name="empty_messages_heading">It\'s Quiet Here...</string>
+    <string name="empty_messages_body">Find friends to chat with or create a group conversation.</string>
+    <string name="new_conversation">New Conversation</string>
 
     <string name="login_onboarding_heading">Welcome to PepChat!</string>
     <string name="login_onboarding_body">Join endless chats and connections; PepChat is your place to vibe with friends!</string>