Form development

- Implement Form, Element, Input, Text
- Add cancel action and render to Plugin
- Add request method to Request
- Partial implementation of Translate
- Add Filter to filter value
- Add Validate to check some behaviour (for form)
- Add StringTrim validator to trim string
- Add Password form element
- Add Html element: Input, Label
- Add Plugin HeadMethod to cancel action if head request
- Add Email validator to check email format
- Add StringCompare validator to check if string is same as another
value
- Add StringEmpty validator to check if the string is empty
- Add StringMinMax validator to check string length