Add apps role and update Neovim installation

- Add apps role to main playbook for application management
- Create comprehensive CLAUDE.md documentation
- Update Neovim installation on Debian/Ubuntu to use official PPA
- Add cross-platform package manager setup (Homebrew, AppMan)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

roles/apps/tasks/main.yml

@@ -0,0 +1,8 @@
+---
+- name: Install package managers
+  import_tasks: package_managers.yml
+  tags: package_managers
+
+- name: Install applications
+  import_tasks: install_apps.yml
+  tags: apps