README: merge usage & migration from single baseline (#28)

Author: janedbal

README.md

@@ -35,18 +35,24 @@ composer require --dev shipmonk/phpstan-baseline-per-identifier
 > [!IMPORTANT]
 > _This usage is available since version 2.0. See legacy usage below if you are still using PHPStan 1.x_
 
-Setup baselines loader, other files will be placed beside that file:
-```neon
-# phpstan.neon.dist
-includes:
-    - baselines/loader.neon # instead of traditional phpstan-baseline.neon
+Remove old single baseline include:
+```diff
+-includes:
+-	- phpstan-baseline.neon
 ```
 
-Run native baseline generation and split it into multiple files via our script:
+Run native baseline generation and split it into multiple files via our script (other baseline files will be placed beside the loader):
 ```sh
 vendor/bin/phpstan --generate-baseline=baselines/loader.neon && vendor/bin/split-phpstan-baseline baselines/loader.neon
 ```
 
+Setup the baselines loader:
+```neon
+# phpstan.neon.dist
+includes:
+    - baselines/loader.neon
+```
+
 _(optional)_ You can simplify generation with e.g. composer script:
 ```json
 {
@@ -99,10 +105,3 @@ Prepare composer script to simplify generation:
 ## PHP Baseline
 - If the loader file extension is php, the generated files will be php files as well
 
-## Migrating from single baseline
-
-1. `rm phpstan-baseline.neon` (and remove its include from `phpstan.neon.dist`)
-2. `mkdir baselines`
-3. `touch baselines/loader.neon`  (and include it in `phpstan.neon.dist`)
-4. Run the split script from above
-