languages: Initialize Tailwind's options with includeLanguages (#43978)

Since [this
PR](https://github.com/tailwindlabs/tailwindcss-intellisense/pull/1014),
the `tailwindCSS.userLanguages` option has been deprecated, and it is
recommended to use `tailwindCSS.includeLanguages` instead. Using
`tailwindCSS.userLanguages` triggers the warning shown below in the
`tailwindcss-language-server` logs.

<img width="634" height="259" alt="tailwindcss-language-server (kron)
Server Logs v"
src="https://github.com/user-attachments/assets/763551ad-f41a-4756-9d7d-dfb7df45cc5c"
/>

Release Notes:

- Fixed a warning indicating the deprecation of
`tailwindCSS.userLanguages` by initializing the options with
`tailwindCSS.includeLanguages`.

---------

Co-authored-by: Smit Barmase <heysmitbarmase@gmail.com>

crates/languages/src/tailwind.rs

@@ -140,13 +140,6 @@ impl LspAdapter for TailwindLspAdapter {
     ) -> Result<Option<serde_json::Value>> {
         Ok(Some(json!({
             "provideFormatter": true,
-            "userLanguages": {
-                "html": "html",
-                "css": "css",
-                "javascript": "javascript",
-                "typescript": "typescript",
-                "typescriptreact": "typescriptreact",
-            },
         })))
     }
 
@@ -167,8 +160,18 @@ impl LspAdapter for TailwindLspAdapter {
             tailwind_user_settings["emmetCompletions"] = Value::Bool(true);
         }
 
+        if tailwind_user_settings.get("includeLanguages").is_none() {
+            tailwind_user_settings["includeLanguages"] = json!({
+                "html": "html",
+                "css": "css",
+                "javascript": "javascript",
+                "typescript": "typescript",
+                "typescriptreact": "typescriptreact",
+            });
+        }
+
         Ok(json!({
-            "tailwindCSS": tailwind_user_settings,
+            "tailwindCSS": tailwind_user_settings
         }))
     }