Add configuration for bash

- Add ~/.bashrc
  + Configure on how the `history` works
  + Enable nicer `cd` and globbing behavior
  + Enable tab completion, even for aliases
  + Add some more stuff from Debian's ~/.bashrc
- Add ~/.bash_logout clearing the screen
- Adapt the installation script to remove
  possibly conflicting files
- Ensure ~/.local/state/bash/ exists

.profile

@@ -1,6 +1,11 @@
 #!/bin/sh
 
 # Main setup file executed for all kinds of shells
+#
+# For `bash`, the following two files must not exist:
+#  - ~/.bash_login
+#  - ~/.bash_profile
+# If they do, this file may not be executed!
 
 
 # Prevent loading ~/.profile twice in `bash`