docs/user/software/command-line: Clean up powerline instructions

- Remove incorrect directions for dash
- Fix directions for fish
- Add paths to config files which will be suitable for new users
- Remove reference to software center
- Put the powerline-daemon command in each shell's example

Fixes #685

Author: sheepman4267

docs/user/software/command-line/index.md

@@ -128,47 +128,34 @@ FZF_KEYBINDING_FILE=/usr/share/fzf/key-bindings.zsh
 ### Installation
 
 Powerline has two components, the plugin system itself `powerline` and the
-fonts `powerline-fonts`. Both are available in the Software Center or via `eopkg` in a terminal:
+fonts `powerline-fonts`. Both are available via `eopkg` in a terminal:
 
 ```bash
 sudo eopkg it powerline powerline-fonts
 ```
 
-To get powerline working inside your terminal, you need to add the following commands to the `.bashrc` inside your `$HOME` directory.
-
-### Shell Prompts
-
-The Powerline daemon is not running automatically by any of the bindings. It is advised to add the following before any other powerline-related code in the shell configuration file
-
-```bash
-powerline-daemon -q
-```
+To get powerline working inside your terminal, you need to follow setup instructions for your preferred shell:  
 
 #### Bash
-
+Add the following to `$HOME/.bashrc`:
 ```bash
 powerline-daemon -q
 POWERLINE_BASH_CONTINUATION=1
 POWERLINE_BASH_SELECT=1
 source /usr/lib/python3.12/site-packages/powerline/bindings/bash/powerline.sh
 ```
 
-#### Busybox and dash
-
-```bash
-source /usr/lib/python3.12/site-packages/powerline/bindings/shell/powerline.sh
-```
-
 #### Fish
-
+Add the following to `$HOME/.config/fish/config.fish` below the comment "`# Commands to run in interactive sessions can go here`":
 ```bash
+powerline-daemon -q
 set fish_function_path $fish_function_path "/usr/lib/python3.12/site-packages/powerline/bindings/fish/"
+powerline-setup
 ```
 
 #### Zsh
-
+Add the following to `$HOME/.zshrc`:
 ```bash
 source /usr/lib/python3.12/site-packages/powerline/bindings/zsh/powerline.zsh
 ```
 
-Read more about powerline on its [docs website](https://powerline.readthedocs.io/en/master/usage.html#shell-prompts-requirements)