docs: expanded windows PowerShell instructions. (#166)

* Expanded Windows PowerShell instructions.

Expanded the windows instructions as there was no clear indicator of which shell to enter each command. Now all commands are entered under PowerShell directly making instructions clearer for newbies.

* Expanded Windows PowerShell instructions

Expanded the windows instructions as there was no clear indicator of which shell to enter each command. Now all commands are entered under PowerShell directly making instructions clearer for newbies.

* Update README.md with easier to follow windows instructions

Expanded the [windows install instructions](https://github.com/justchokingaround/lobster#windows) as there was no clear indicator of which shell to enter each command in. Also, now all commands are entered under PowerShell as listed in the [usage](https://github.com/justchokingaround/lobster#usage) directly making instructions clearer for newbies.

* Update README.md

Corrected instances of bash omitted invocations

README.md

@@ -133,14 +133,14 @@ chmod +x "$(brew --prefix)"/bin/lobster
 
 Open a PowerShell terminal https://learn.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows?view=powershell-7.2#msi (version 5.1 or later) and run:
 
-```sh
+```ps
 Set-ExecutionPolicy RemoteSigned -Scope CurrentUser
 irm get.scoop.sh | iex
 ```
 
 2. Install git,mpv and fzf
 
-```sh
+```ps
 scoop bucket add extras
 scoop install git mpv fzf
 ```
@@ -151,26 +151,31 @@ scoop install git mpv fzf
    https://git-scm.com/download/win
 
 5. Symlink mpv to be in path.
-```sh
-ln -sf "$(scoop prefix mpv)/mpv.exe" /usr/bin/mpv
+```ps
+bash ln -sf "$(scoop prefix for mpv)/mpv.exe" /usr/bin/mpv
 ```
 
 6. Download the script file to the current directory
-```sh
+```ps
 curl -O "https://raw.githubusercontent.com/justchokingaround/lobster/main/lobster.sh"
 ```
 
 7. Give it executable permissions
 ```sh
-chmod +x lobster.sh
+bash chmod +x lobster.sh
 ```
 
 8. Copy the script to path
 ```sh
-cp lobster.sh /usr/bin/lobster
+bash cp lobster.sh /usr/bin/lobster
 ```
 
-9. Use lobster
+9. Create a Powershell Lobster function by adding the following to the end of `Microsoft.PowerShell_profile.ps1`. You can check the location of this file by querying the $PROFILE variable in PowerShell. Typically the path is `~\Documents\PowerShell\Microsoft.PowerShell_profile.ps1`
+```ps
+function lobster { param([string[]]$Args); & bash -c "lobster $($Args -join ' ')" Invoke-Expression $command }
+```
+
+10. Use lobster
 ```sh
 lobster <args> or lobster [movie/tv show]
 ```
@@ -530,6 +535,6 @@ rm "$(brew --prefix)"/bin/lobster
 
 ### Windows
 
-```sh
-rm /usr/bin/lobster
+```ps
+bash rm /usr/bin/lobster
 ```