Update GuXTi channel

packages: add tree-sitter-yaml

guix-install.d: Add emacs-xclip

Update guxti channel

Refactor package manifests and update AI tools integration

Update base image to debian:trixie, remove gitpod support

packages: Remove tree-sitter-cpp from manifests

guix-install.d/channels.scm: Add channel introductions.

Update dependencies and configurations in various files

* Dockerfile.*: Add rclone, file, fuse-overlayfs, rsync, xsel, xdotool.
* guix-install.d/channels.scm: Update URLs and commit hash.
* guix-install.d/manifest.scm: Remove emacs-shell-command+; add xst, clipnotify.
* guix-install.d/pack.scm: Remove emacs-shell-command+.
* profile/etc/emacs.d/init.el: Adjust orderless settings; bind <f9>; add diff-mode.

Move docker-compose to apt packages