Redmine

We use redmine very long time, system default - textile, many users(but not all) want use markdown for formatting, but user can't set for him preferred text formatting.

Please add following setting for user with options:

• Use project/system formatting (default)
• Markdown
• Textile

What need for success?

• Add for all formatting entity field - formatting_type
• Render any post/wiki/etc using formating from this field
• Migation all entities to project/global settings (may be optional, because null means use project/global setting)

Environment:
  Redmine version                6.1.0.stable
  Ruby version                   3.4.7-p58 (2025-10-08) [x86_64-linux]
  Rails version                  7.2.2.2
  Environment                    production
  Database adapter               SQLite
  Mailer queue                   ActiveJob::QueueAdapters::AsyncAdapter
  Mailer delivery                smtp
Redmine settings:
  Redmine theme                  Default
SCM:
  Subversion                     1.14.5
  Mercurial                      7.0.1
  Bazaar                         3.3.11
  Git                            2.47.3
  Filesystem