Fix virtualhost flow accuracy and clarify the two-step setup process

[bidi47]

• Drops redundant "AlmaLinux 10 " title prefixes on create-virtualhost.md,
  setup-packages.md, and virtualhosts/overview.md. Resolves postman issue  #21
  (partial - the 4th file, faq.md, is in the FAQ PR).
• Fixes the wrong virtualhost config path: the file Ansible actually writes
  is example.localhost.conf, not example.localhost (confirmed against
  wsl/roles/virtualhost/tasks/create.yml). Resolves test ansible recipe on Windows 11 #1.
• Fixes a missing noun ("...list of configured, and output..." ->
  "...list of configured virtualhosts, and output..."). Resolves install mariadb 10.11  #23.
• Fixes hyphen-flattened em dashes, and phrases the PHP default version by
  pointing at wsl/roles/php/tasks/main.yml instead of hardcoding a number
  that will drift again. Resolves git command for ignoring file permissions #22 (partial).
• Fixes absolute cross-links to relative paths. Resolves test slack integration #20 (partial).
• Clarifies that provisioning is two independent, repeatable steps:
  install.yml sets up the server-wide stack once; creating a virtualhost
  per project is separate and can be repeated any time. Reworded
  create-virtualhost.md's summary and setup-packages.md's
  config.virtualhosts field + "Next step" section accordingly.
  Resolves test ansible recipe on Windows 10 #2.
• Adds a short security-framing note to setup-packages.md: this stack is
  local-development-only, with a plaintext MariaDB root password and
  root-login phpMyAdmin exposed at a predictable path. Resolves Issue #14: Fixed MariaDB installation on AlmaLinux9 #15.