refactor!: Rename template to generate and move rebase/upgrade under switch (#116)

This updates the `template` subcommand to be `generate`. The `template`
usage will continue to work as an alias to `generate`. A new `switch`
command is added that will manage both `rpm-ostree rebase` and
`rpm-ostree upgrade` and is fully replacing the respective subcommands
as a breaking change.

The new `switch` command is under the feature flag `switch` and will
currently only build for the `main` branch builds until it is moved as a
default feature (`v0.9.0`).

Closes #159

recipe/Cargo.toml

@@ -10,12 +10,12 @@ license.workspace = true
 
 [dependencies]
 blue-build-utils = { version = "=0.8.9", path = "../utils" }
-chrono = "0.4"
-indexmap = { version = "2", features = ["serde"] }
 
 anyhow.workspace = true
+chrono.workspace = true
 colored.workspace = true
 log.workspace = true
+indexmap.workspace = true
 serde.workspace = true
 serde_yaml.workspace = true
 serde_json.workspace = true