FEATURE: add Bsh + userspace terminal, remove legacy cmd/cli utils

docs/usage/terminal.md

@@ -4,7 +4,7 @@ The BoredOS Terminal provides a powerful command-line interface (CLI) for advanc
 
 ## The Shell
 
-The default shell in BoredOS is a custom-built, lightweight command processor integrated into the Window Manager. It features:
+The default shell in BoredOS is **BoredShell (Bsh)**, a userspace shell with a dedicated terminal app. It features:
 -   **ANSI Color Support**: Rich text output with colors and styles.
 -   **Command History**: Use the **Up** and **Down** arrow keys to navigate through your previous commands (up to 64 history entries).
 -   **Output Redirection**:
@@ -13,6 +13,33 @@ The default shell in BoredOS is a custom-built, lightweight command processor in
 -   **Piping**:
     -   `command1 | command2`: Pass the output of the first command as input to the second.
 
+### Bsh Configuration
+
+Bsh loads its configuration from:
+
+`/Library/bsh/bshrc`
+
+This file is similar to `.zshrc` and can define:
+- `PATH` for command lookup
+- `STARTUP` for interactive shell startup scripts
+- `BOOT_SCRIPT` for a once-per-boot script
+- prompt templates (`PROMPT_LEFT`, `PROMPT_RIGHT`)
+
+Prompt tokens:
+- `%n` username
+- `%h` hostname
+- `%~` cwd ("~" for `/root`)
+- `%T` time (HH:MM)
+
+Example:
+
+```
+PATH=/bin:/root/Apps
+PROMPT_LEFT=%n@%h:%~$ 
+STARTUP=/Library/bsh/startup.bsh
+BOOT_SCRIPT=/Library/bsh/boot.bsh
+```
+
 ## Common Commands
 
 Below are some of the most used commands available in `/bin`: