[Docs] Write documentation for Hjelp features

docs/Makefile

docs/_static/ask_a_question.png

docs/_static/faq.png

docs/_static/faq_question.png

docs/_static/faq_section.png

docs/_static/feedback.png

docs/_static/issue_categories.png

docs/_static/issue_category.png

docs/_static/manage_faq.png

docs/_static/report_issue.png

docs/admin/00_index.rst

docs/admin/10_managing_faqs.rst

docs/admin/15_managing_issue_report_form.rst

docs/admin/40_preferences.rst

docs/conf.py

docs/index.rst

docs/make.bat

docs/user/00_index.rst

docs/user/01_faq.rst

docs/user/10_issue_reporting.rst