[TASK] Add social sharer and contact information to application page

Classes/Domain/Model/Contact.php

Configuration/TCA/tx_sgjobs_domain_model_contact.php

Resources/Private/Language/de.locallang.xlf

Resources/Private/Language/de.locallang_db.xlf

Resources/Private/Language/locallang.xlf

Resources/Private/Language/locallang_db.xlf

Resources/Private/Language/zh.locallang.xlf

Resources/Private/Templates/Joblist/ApplyForm.html

ext_tables.sql