Email verification code (#1382)

* Base verification code implementation, must define command, manager, events
* VerificationManager, verification command and messages, handled some sensible commands, configuration values
* Improved manager and sensible commands trigger
* Updated messages
* Updated verification code manager, fixed tests
* Switched to a permission based command
* Verification manager and command improved and added tests
* Edited messages

src/main/resources/messages/messages_eu.yml

@@ -96,6 +96,15 @@ recovery_email: '&cPasahitza ahaztu duzu? Erabili /email recovery <zureemaila>'
 # TODO wrong_captcha: '&cWrong captcha, please type "/captcha THE_CAPTCHA" into the chat!'
 # TODO valid_captcha: '&2Captcha code solved correctly!'
 
+# Verification code
+# TODO verification_code_required: '&3This command is sensitive and requires an email verification! Check your inbox and follow the email''s instructions.'
+# TODO usage_verification_code: '&cUsage: /verification <code>'
+# TODO incorrect_verification_code: '&cIncorrect code, please type "/verification <code>" into the chat, using the code you received by email'
+# TODO verification_code_verified: '&2Your identity has been verified! You can now execute all commands within the current session!'
+# TODO verification_code_already_verified: '&2You can already execute every sensitive command within the current session!'
+# TODO verification_code_expired: '&3Your code has expired! Execute an other sensitive command to get a new code!'
+# TODO verification_code_email_needed: '&3To verify your identity you need to link an email address with your account!!'
+
 # Time units
 # TODO second: 'second'
 # TODO seconds: 'seconds'