Rewrite demoextendsymfonyform1 module without CQRS

[matks]

Questions	Answers
Description?	There is confusion about Demo Symfony Form module 1 because the module demonstrates 2 things: how to use a CQRS in a module AND how to use hooks to add new field to a Symfony form Some community developers think that the two must be together although actually you can choose to use CQRS or not to add new field to a Symfony form. To fix this I will split this module into 2 demo modules. This PR rewrites the module without CQRS.
Type?	improvement
BC breaks?	no
Deprecations?	no
Fixed ticket?	Fixes 1 item of #32
How to test?	Test module works fine as before.
Possible impacts?

[kpodemski]

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