docs(README): add Windows install instruction for Winget (#304)

* README: add Windows Install Instruction (Winget)

* README: update winget pkg identifier to Moniker

* README: update Windows installation instruction

Co-authored-by: Ayman Bagabas <ayman.bagabas@gmail.com>

---------

Co-authored-by: Ayman Bagabas <ayman.bagabas@gmail.com>

README.md

@@ -60,6 +60,9 @@ manager:
 # macOS or Linux
 brew tap charmbracelet/tap && brew install charmbracelet/tap/soft-serve
 
+# Windows (with Winget)
+winget install charmbracelet.soft-serve
+
 # Arch Linux
 pacman -S soft-serve