Support Windsurf for setting cursor position in snippets (#3634)

Inspired by #3302

Author: ttilberg

lib/ruby_lsp/requests/on_type_formatting.rb

@@ -162,7 +162,7 @@ def add_edit_with_text(text, position = @position)
 
       #: (Integer line, Integer character) -> void
       def move_cursor_to(line, character)
-        return unless /Visual Studio Code|Cursor|VSCodium/.match?(@client_name)
+        return unless /Visual Studio Code|Cursor|VSCodium|Windsurf/.match?(@client_name)
 
         position = Interface::Position.new(
           line: line,

test/requests/on_type_formatting_test.rb

@@ -1015,6 +1015,46 @@ def test_includes_snippets_on_vscodium
     assert_equal(expected_edits.to_json, edits.to_json)
   end
 
+  def test_includes_snippets_on_windsurf
+    document = RubyLsp::RubyDocument.new(
+      source: +"",
+      version: 1,
+      uri: URI("file:///fake.rb"),
+      global_state: @global_state,
+    )
+
+    document.push_edits(
+      [{
+        range: { start: { line: 0, character: 0 }, end: { line: 0, character: 0 } },
+        text: "class Foo",
+      }],
+      version: 2,
+    )
+    document.parse!
+
+    edits = RubyLsp::Requests::OnTypeFormatting.new(
+      document,
+      { line: 1, character: 2 },
+      "\n",
+      "Windsurf",
+    ).perform
+    expected_edits = [
+      {
+        range: { start: { line: 1, character: 2 }, end: { line: 1, character: 2 } },
+        newText: "\n",
+      },
+      {
+        range: { start: { line: 1, character: 2 }, end: { line: 1, character: 2 } },
+        newText: "end",
+      },
+      {
+        range: { start: { line: 1, character: 2 }, end: { line: 1, character: 2 } },
+        newText: "$0",
+      },
+    ]
+    assert_equal(expected_edits.to_json, edits.to_json)
+  end
+
   def test_does_not_confuse_class_parameter_with_keyword
     document = RubyLsp::RubyDocument.new(
       source: +"",