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

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

test/system/settings_test.rb

@@ -39,6 +39,7 @@ class SettingsTest < ApplicationSystemTestCase
   test "can update self hosting settings" do
     Rails.application.config.app_mode.stubs(:self_hosted?).returns(true)
     Provider::Registry.stubs(:get_provider).with(:twelve_data).returns(nil)
+    Provider::Registry.stubs(:get_provider).with(:yahoo_finance).returns(nil)
     open_settings_from_sidebar
     assert_selector "li", text: "Self-Hosting"
     click_link "Self-Hosting"