HEEx: support new embed syntax with curly braces

Author: azizk

Diff for: syntaxes/HTML (HEEx).sublime-syntax

@@ -66,6 +66,7 @@ contexts:
     - match: </{{is_heex_tag_name}}
       scope: punctuation.definition.tag.begin.html
       push: [heex-end-tag-content-pop, heex-end-tag-name-pop]
+    - include: elixir-embedded
 
   heex-begin-tag-content-pop:
     - meta_scope: meta.tag.other.heex

Diff for: tests/syntax_test_template.html.heex

@@ -46,8 +46,19 @@
      <script>
        <%= @elixir %>
 <!--        ^^^^^^ variable.annotation.js - source.elixir -->
+       { "1" <> "2" }
+<!--   ^^^^^^^^^^^^^^ -meta.embedded.heex -->
      </script>
 
+     {"1" <> "2"}
+<!--            ^ punctuation.section.embedded.end.elixir -->
+<!--         ^^^ meta.string.elixir string.quoted.double.elixir -->
+<!--      ^^ keyword.operator.binary-concat.elixir -->
+<!--  ^^^ meta.string.elixir string.quoted.double.elixir -->
+<!--  ^^^^^^^^^^ source.elixir.embedded.html -->
+<!-- ^ punctuation.section.embedded.begin.elixir -->
+<!-- ^^^^^^^^^^^^ meta.embedded.heex -->
+
      <table :for={user <- @users} :if={assigns[:users]}><:col :let={user}><%= user.id %></:col></table>
 <!--                                                               ^^^^^^ meta.embedded.heex -->
 <!--                                                           ^^^ entity.other.attribute-name.heex -->