Update CLI readme to include installation methods (viamrobotics#3408)

cli/README.md

@@ -1,9 +1,39 @@
 ## [EXPERIMENTAL] Viam Command Line Interface
 
-This is an experimental feature, so things may change without notice.
+This is an experimental feature, so things may change without notice. All feedback on the cli is greatly appreciated.
 
-Install with `go build -o ~/go/bin/viam cli/viam/main.go`
 
 ### Getting Started
 Enter `viam login` and follow instructions to authenticate.
 
+### Installation
+
+With brew (macOS & linux amd64):
+```sh
+brew tap viamrobotics/brews
+brew install viam
+```
+As a binary (linux amd64):
+```sh
+sudo curl -o /usr/local/bin/viam https://storage.googleapis.com/packages.viam.com/apps/viam-cli/viam-cli-stable-linux-amd64
+sudo chmod a+rx /usr/local/bin/viam
+```
+
+As a binary (linux arm64):
+```sh
+sudo curl -o /usr/local/bin/viam https://storage.googleapis.com/packages.viam.com/apps/viam-cli/viam-cli-stable-linux-arm64
+sudo chmod a+rx /usr/local/bin/viam
+```
+
+From source (you must [install go](https://go.dev/doc/install) first):
+```sh
+go install go.viam.com/rdk/cli/viam@latest
+# add go binaries to your path (if you haven't already)
+echo 'export PATH="$HOME/go/bin:$PATH"' >> ~/.bashrc
+```
+
+### Development
+Building (you must [install go](https://go.dev/doc/install) first):
+```sh
+go build -o ~/go/bin/viam cli/viam/main.go
+```