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

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

bash/.bash_aliases

@@ -0,0 +1,2 @@
+# Bash-specific aliases
+# Add bash-only aliases here if needed