docs: remove emojis from all wiki pages
docs: add System Requirements and Prerequisites guide
docs: replace RVM with rbenv throughout deployment guides
Document .env and certificate security best practices, secret_key_base and rails_master_key details
Document Shibboleth Discovery Service modes and environment variables
Updated Environment Configuration (markdown)
style: globally remove emojis and duplicate H1 headers from all wiki pages
Completely document all .env environment variables
Split single deployment page into focused subpages and add a Decision Matrix to Installation page