Document missing commands (#289)

Author: anttiharju

docs/README.md

@@ -30,6 +30,12 @@ vmatch doctor
 
 Mainly, you should have `~/.vmatch/bin` in your PATH.
 
+## Updating
+
+```sh
+brew update && brew upgrade vmatch
+```
+
 ### Note on expectations
 
 When the specified Go version is downloaded for the first time, it may take a while.

docs/commands/version.md

@@ -0,0 +1,11 @@
+# golangci-lint
+
+```sh
+vmatch version
+```
+
+Prints out installed vmatch version in the following format:
+
+```
+vmatch has version 1.0.1 built with go1.24.3 from c675e288 on 2025-05-30T19:20:58Z
+```