vim: Add HTML tag support for #4503 (#8175)

a simple code for html tag support, I've only done the basics, and if
it's okay, I'll optimize and organize the code, and adapt other parts
like `is_multiline`, `always_expands_both_ways`, `target_visual_mode`,
etc

---------

Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/vim/src/test/vim_test_context.rs

@@ -31,6 +31,11 @@ impl VimTestContext {
         Self::new_with_lsp(lsp, enabled)
     }
 
+    pub async fn new_html(cx: &mut gpui::TestAppContext) -> VimTestContext {
+        Self::init(cx);
+        Self::new_with_lsp(EditorLspTestContext::new_html(cx).await, true)
+    }
+
     pub async fn new_typescript(cx: &mut gpui::TestAppContext) -> VimTestContext {
         Self::init(cx);
         Self::new_with_lsp(