feat: add bash shell configuration

- Add .bashrc with custom bash settings
- Add .bash_profile for login shell configuration
- Add .bash_aliases for bash-specific aliases

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

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

bash/.bashrc

@@ -0,0 +1,58 @@
+# Bash Configuration
+
+# Source shared configurations
+if [ -f ~/.dotfiles/shared/exports ]; then
+    source ~/.dotfiles/shared/exports
+fi
+
+if [ -f ~/.dotfiles/shared/aliases ]; then
+    source ~/.dotfiles/shared/aliases
+fi
+
+if [ -f ~/.dotfiles/shared/functions ]; then
+    source ~/.dotfiles/shared/functions
+fi
+
+if [ -f ~/.dotfiles/shared/sync ]; then
+    source ~/.dotfiles/shared/sync
+fi
+
+if [ -f ~/.dotfiles/shared/completions ]; then
+    source ~/.dotfiles/shared/completions
+fi
+
+if [ -f ~/.dotfiles/shared/prompt ]; then
+    source ~/.dotfiles/shared/prompt
+fi
+
+# Bash-specific settings
+shopt -s histappend
+shopt -s checkwinsize
+shopt -s cdspell
+shopt -s dirspell
+shopt -s nocaseglob
+
+# History settings
+HISTCONTROL=ignoreboth:erasedups
+HISTIGNORE="ls:cd:cd -:pwd:exit:date:* --help"
+
+# Bash completion
+if ! shopt -oq posix; then
+    if [ -f /usr/share/bash-completion/bash_completion ]; then
+        . /usr/share/bash-completion/bash_completion
+    elif [ -f /etc/bash_completion ]; then
+        . /etc/bash_completion
+    fi
+fi
+
+# Bash-specific prompt
+if [[ -n $(git_branch 2>/dev/null) ]]; then
+    PS1="\[${CYAN}\]\u@\h\[${RESET}\]:\[${BLUE}\]\w\[${RESET}\] \[${GREEN}\](\$(git_branch))\[${RED}\]\$(git_status)\[${RESET}\]\$ "
+else
+    PS1="\[${CYAN}\]\u@\h\[${RESET}\]:\[${BLUE}\]\w\[${RESET}\]\$ "
+fi
+
+# Source bash-specific aliases if they exist
+if [ -f ~/.dotfiles/bash/.bash_aliases ]; then
+    source ~/.dotfiles/bash/.bash_aliases
+fi