Start work on ERB language support

crates/zed/src/languages.rs

@@ -117,6 +117,7 @@ pub async fn init(languages: Arc<LanguageRegistry>, _executor: Arc<Background>)
             Some(CachedLspAdapter::new(html::HtmlLspAdapter).await),
         ),
         ("ruby", tree_sitter_ruby::language(), None),
+        ("erb", tree_sitter_embedded_template::language(), None),
     ] {
         languages.add(language(name, grammar, lsp_adapter));
     }

crates/zed/src/languages/erb/config.toml

@@ -0,0 +1,8 @@
+name = "ERB"
+path_suffixes = ["erb"]
+autoclose_before = ">})"
+brackets = [
+    { start = "<", end = ">", close = true, newline = true },
+]
+
+block_comment = ["<%#", "%>"]

crates/zed/src/languages/erb/injections.scm

@@ -0,0 +1,7 @@
+((code) @content
+ (#set! "language" "ruby")
+ (#set! "combined"))
+
+((content) @content
+ (#set! "language" "html")
+ (#set! "combined"))