Add oh-my-bash, fastfetch, and eza configurations

- Updated bash/.bashrc with oh-my-bash framework
  - Theme: agnoster
  - Plugins: git, bashmarks
  - Completions: git, composer, ssh

- Added fastfetch configuration (replaces neofetch)
  - Created fastfetch/.config/fastfetch/config.jsonc
  - Clean modern layout with cyan-colored keys
  - Displays system info, hardware, and color palette

- Replaced exa with eza (maintained fork)
  - Added alias: ls='eza -l --color=always --group-directories-first'
  - Included color support for grep commands
  - Added convenience aliases: ll, la, l

- Updated setup.sh to include fastfetch in stow packages
- Configured bashrc to run fastfetch on terminal startup
- Added ~/.local/bin to PATH for custom binaries

setup.sh

@@ -5,7 +5,7 @@ set -e
 DOTFILES_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
 # Packages to stow
-PACKAGES=(bash kitty)
+PACKAGES=(bash kitty fastfetch)
 
 echo "Setting up dotfiles from $DOTFILES_DIR"