Feat: Support for Microsoft Oauth in Email Channel (#6227)

- Adds the backend APIs required for Microsoft Email Channels

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>
Co-authored-by: Sojan <sojan@pepalo.com>

db/migrate/20221230113108_add_ms_oauth_token_to_channel.rb

@@ -0,0 +1,8 @@
+class AddMsOauthTokenToChannel < ActiveRecord::Migration[6.1]
+  def change
+    change_table :channel_email, bulk: true do |t|
+      t.jsonb :provider_config, default: {}
+      t.string :provider
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2022_12_19_162759) do
+ActiveRecord::Schema.define(version: 2022_12_30_113108) do
 
   # These are extensions that must be enabled in order to support this database
   enable_extension "pg_stat_statements"
@@ -252,6 +252,8 @@ ActiveRecord::Schema.define(version: 2022_12_19_162759) do
     t.string "smtp_authentication", default: "login"
     t.string "smtp_openssl_verify_mode", default: "none"
     t.boolean "smtp_enable_ssl_tls", default: false
+    t.jsonb "provider_config", default: {}
+    t.string "provider"
     t.index ["email"], name: "index_channel_email_on_email", unique: true
     t.index ["forward_to_email"], name: "index_channel_email_on_forward_to_email", unique: true
   end