ruby : Fix of C++ header guard name, model URI support, type signature and more (#2683)

* Add test to make Whisper::Context.new accept URI string

* Add test to make Whisper::Context.new accept URI

* Make Whisper::Context.new accept URI string and URI

* Update README

Revert "Fix argument of rb_undefine_finalizer"

* Fix typos

* Add type signature file

* Assign literarl to const variable

* Load Whisper::Model::URI from Init_whisper

* Simplify .gitignore

* Don't load whisper.so from whisper/model/uri.rb

* Use each_with_object instead of each

* Add Development section to README

* Rename header guard to conform to C++ naming convention

bindings/ruby/tests/test_model.rb

@@ -68,4 +68,42 @@ class TestModel < TestBase
     assert_path_exist path
     assert_equal 147964211, File.size(path)
   end
+
+  def test_uri_string
+    path = "https://huggingface.co/ggerganov/whisper.cpp/resolve/main/ggml-base.en.bin"
+    whisper = Whisper::Context.new(path)
+    model = whisper.model
+
+    assert_equal 51864, model.n_vocab
+    assert_equal 1500, model.n_audio_ctx
+    assert_equal 512, model.n_audio_state
+    assert_equal 8, model.n_audio_head
+    assert_equal 6, model.n_audio_layer
+    assert_equal 448, model.n_text_ctx
+    assert_equal 512, model.n_text_state
+    assert_equal 8, model.n_text_head
+    assert_equal 6, model.n_text_layer
+    assert_equal 80, model.n_mels
+    assert_equal 1, model.ftype
+    assert_equal "base", model.type
+  end
+
+  def test_uri
+    path = URI("https://huggingface.co/ggerganov/whisper.cpp/resolve/main/ggml-base.en.bin")
+    whisper = Whisper::Context.new(path)
+    model = whisper.model
+
+    assert_equal 51864, model.n_vocab
+    assert_equal 1500, model.n_audio_ctx
+    assert_equal 512, model.n_audio_state
+    assert_equal 8, model.n_audio_head
+    assert_equal 6, model.n_audio_layer
+    assert_equal 448, model.n_text_ctx
+    assert_equal 512, model.n_text_state
+    assert_equal 8, model.n_text_head
+    assert_equal 6, model.n_text_layer
+    assert_equal 80, model.n_mels
+    assert_equal 1, model.ftype
+    assert_equal "base", model.type
+  end
 end