[FIX] *: add explicit license to all manifest

The license is missing in most enterprise manifest so
the decision was taken to make it explicit in all cases.
When not defined, a warning will be triggered starting from
14.0 when falling back on the default LGPL-3.

closes odoo/design-themes#44

Related: odoo/enterprise#19851
Related: odoo/odoo#74233
Signed-off-by: Xavier Dollé (xdo) <xdo@odoo.com>

test_themes/__manifest__.py

@@ -49,5 +49,6 @@
         'web.assets_frontend': [
             'test_themes/static/src/js/navbar.js',
         ],
-    }
+    },
+    'license': 'LGPL-3',
 }

theme_common/__manifest__.py

@@ -12,4 +12,5 @@
         'views/old_snippets/s_three_columns_circle.xml',
         ],
     'application': False,
+    'license': 'LGPL-3',
 }

website_animate/__manifest__.py

@@ -19,5 +19,6 @@
         'website.assets_editor': [
             'website_animate/static/src/js/o_animate.editor.js',
         ],
-    }
+    },
+    'license': 'LGPL-3',
 }