Update flake inputs and flake.lock to Nix/nixpkgs and home-manager
release 25.11; bump home.stateVersion and setup script NIXOS_RELEASE.
Migrate git config to new Home Manager layout (programs.git.settings,
aliases under settings.alias), adjust delta config path, and reorganize
SSH into matchBlocks with enableDefaultConfig=false to avoid global
leaks. Simplify snapd session variable handling to avoid recursion.
Misc: tweak Dashy title, replace du-dust->dust and plex-media-player ->
plex-desktop, remove unused hostname arg, and add GitHub Copilot
instructions document.
- Move environment variable exports from sessionVariables to bashrc
- Add more robust sourcing of .profile and .bashrc.local
- Improve SSH_AUTH_SOCK override logic for 1Password
- Remove redundant path and pyenv logic from profileExtra
- Set git core.editor to "zed" instead of "nvim"
- Add DOTFILES_PATH to global session variables
