Chore: Use installation config in frontend (#847)

* Use installation config in widget
* Add configuration for installation in UI
* Add config for mailer

Co-authored-by: Sojan <sojan@pepalo.com>

app/javascript/shared/store/globalConfig.js

@@ -0,0 +1,33 @@
+const {
+  LOGO_THUMBNAIL: logoThumbnail,
+  LOGO: logo,
+  INSTALLATION_NAME: installationName,
+  WIDGET_BRAND_URL: widgetBrandURL,
+  TERMS_URL: termsURL,
+  PRIVACY_URL: privacyURL,
+} = window.globalConfig;
+
+const state = {
+  logoThumbnail,
+  logo,
+  installationName,
+  widgetBrandURL,
+  termsURL,
+  privacyURL,
+};
+
+export const getters = {
+  get: $state => $state,
+};
+
+export const actions = {};
+
+export const mutations = {};
+
+export default {
+  namespaced: true,
+  state,
+  getters,
+  actions,
+  mutations,
+};