#6898 Codesnippet support token type Text

In the code snippet, it should be possible to insert text elements via the content assist.
To make this possible, the token type 'Text' was added.

This allows e.g. code keywords like if, else ... to be added so that the specifier can add the keywords via the content assist.





On github there is an example:
​https://github.com/actifsource/ch.actifsource.example.codesnippet