docs: add graphical installers to README (#20)

Co-authored-by: Matt Topol <zotthewizard@gmail.com>

Author: ianmcook

README.md

@@ -69,7 +69,15 @@ curl -LsSf https://dbc.columnar.tech/install.sh | less
 
 #### Windows
 
-Use `irm` to download the script and execute it with `iex`:
+Download the Windows graphical installer for your architecture:
+
+| Architecture |  Installer                                              |
+| ------------ | ------------------------------------------------------- |
+| x64 (64-bit) | <https://dbc.columnar.tech/latest/dbc-latest-x64.msi>   |
+| x86 (32-bit) | <https://dbc.columnar.tech/latest/dbc-latest-x86.msi>   |
+| ARM64        | <https://dbc.columnar.tech/latest/dbc-latest-arm64.msi> |
+
+Or use `irm` to download the install script and execute it with `iex`:
 
 ```sh
 powershell -ExecutionPolicy ByPass -c "irm https://dbc.columnar.tech/install.ps1 | iex