✨ (.zshrc, install.sh): streamline zsh-autosuggestions plugin configuration and remove marker installation logic

.zshrc

@@ -62,7 +62,7 @@ ZSH_THEME="powerlevel10k/powerlevel10k"
 # Add wisely, as too many plugins slow down shell startup.
 plugins=(
     # zsh-completions   INSTALL METHOD CHANGED https://github.com/zsh-users/zsh-completions/issues/603
-    zsh-autosuggestions     # Disable if you are using Marker, otherwise enable
+    zsh-autosuggestions
     zsh-syntax-highlighting
     history-substring-search
     systemd
@@ -134,7 +134,7 @@ plugins=(
 # NPM_PACKAGES="${HOME}/.npm"
 # PATH="$NPM_PACKAGES/bin:$PATH"
 
-[[ -s "$HOME/.marker/marker.sh" ]] && source "$HOME/.marker/marker.sh"
+
 
 fpath+=$ZSH/custom/plugins/zsh-completions/src
 autoload -U compinit && compinit -C -d ~/.cache/zsh/.zcompdump        # zsh-completions