add use cases + MSRV to readme

README.md

@@ -1,3 +1,27 @@
 # Cargo Version Control System extension
 
-Cargo-vcs is a Cargo extension that adds version control helpers to help manage workspaces.
+Cargo-vcs is a Cargo extension that adds version control helpers to help manage workspace projects.
+
+## Example use cases
+
+### View current branch and MSRV status for workspace projects
+
+- `cargo vcs status` - for brief overview
+- `cargo vcs status -v` - for verbose view
+
+### Switch to a branch on all workspace projects
+
+- `cargo vcs branch set master`
+
+### Save currently set workspace branches as a profile
+
+- `cargo vcs profile save profile1`
+
+### Switch to a previously saved workspace profile
+
+- `cargo vcs profile set profile1`
+
+## Minimum Supported Rust Version (MSRV)
+
+This crate is guaranteed to compile on stable Rust 1.59.0 and up. It *might*
+compile with older versions but that may change in any new patch release.