Say work in progress, not what is in progress (GH-14)

The status notice listed which subsystems had landed and which had not, which
is a second changelog to keep honest and stale the moment a command lands
without someone remembering to edit it. What a reader needs from a README is
whether to depend on this yet.

Author: Ilyes512

README.md

@@ -7,13 +7,11 @@ resolves the desired set, computes an ordered plan, and then applies it — or p
 `--dry-run`. One `labels.yml` describes the labels you want; groups describe which repositories
 should have them.
 
-> **Status: in development.** The command tree, the output layer, and the exit codes are in place.
-> The reconciling commands — `sync`, `export`, `init`, `groups`, `cache` — are not implemented yet,
-> and there is no release to install.
+> **Work in progress.** Not ready for use yet.
 
 ## Install
 
-Once the first release is tagged:
+Once released:
 
 ```sh
 brew install specsnl/tap/labelsync