Improve help for bake migrations command

src/Command/BakeMigrationCommand.php

@@ -168,10 +168,29 @@ public function getOptionParser(): ConsoleOptionParser
 
 * The types are the abstract database column types in CakePHP.
 * The <warning>?</warning> value indicates if a column is nullable.
-  e.x. `role:string?`.
-* Length option must be enclosed in `[]` e.x. `name:string[100]`
-* The `index` attribute can define the column as having a unique
-  key with `unique` or a primary key with `primary`.
+  e.x. <warning>role:string?</warning>.
+* Length option must be enclosed in <warning>[]</warning> e.x. <warning>name:string[100]</warning>
+* The <warning>index</warning> attribute can define the column as having a unique
+  key with <warning>unique</warning> or a primary key with <warning>primary</warning>.
+
+<info>Examples</info>
+
+<warning>bin/cake bake migration AddOrgIdToProjects org_id:int</warning>
+Create a migration that adds a column (<warning>org_id INT</warning>) to the <warning>projects</warning>
+table.
+
+<warning>bin/cake bake migration AddOrgIdToProjects org_id:int?</warning>
+Create a migration that adds a nullable column (<warning>org_id INT NULL</warning>) to the <warning>projects</warning>
+table.
+
+<warning>bin/cake bake migration AddNameToProjects name:string[128]</warning>
+Create a migration that adds (<warning>name VARCHAR(128)</warning>) to the <warning>projects</warning>
+table.
+
+<warning>bin/cake bake migration AddSlugToProjects name:string[128]:unique</warning>
+Create a migration that adds (<warning>name VARCHAR(128)</warning> and a <warning>UNIQUE<.warning index) 
+to the <warning>projects</warning> table.
+
 TEXT;
 
         $parser->setDescription($text);