Feature/yahoo finance (#123)

* Implement Yahoo Finance

* Added tests

* Updated hosting controller to check for managed app_mode instead of env_override

* Suggestions from CodeRabbit and Fixes on tests

* Remove Css changes

* Fix yahoo finance impl and i18n

* Updated view to use healthy method

* remove usage

* Updated env example

* keep usage on class just to keep same format

* Ci test

* Remove some useless validations

* Remove logs

* Linter fixes

* Broke this in my conflict merge

* Wrong indentation level

---------

Signed-off-by: Juan José Mata <juanjo.mata@gmail.com>
Co-authored-by: Juan José Mata <juanjo.mata@gmail.com>

test/controllers/settings/hostings_controller_test.rb

@@ -9,14 +9,17 @@ class Settings::HostingsControllerTest < ActionDispatch::IntegrationTest
 
     @provider = mock
     Provider::Registry.stubs(:get_provider).with(:twelve_data).returns(@provider)
-    @usage_response = provider_success_response(
+
+    @provider.stubs(:healthy?).returns(true)
+    Provider::Registry.stubs(:get_provider).with(:yahoo_finance).returns(@provider)
+    @provider.stubs(:usage).returns(provider_success_response(
       OpenStruct.new(
         used: 10,
         limit: 100,
         utilization: 10,
         plan: "free",
       )
-    )
+    ))
   end
 
   test "cannot edit when self hosting is disabled" do