Editor blitz

Bulk of work done for a first view on the edit component(s) and interface for definitions. A testbed blade was used (and has been added and will remain in the repo) called term_edit_2 which appears when adding a ?v=2 at the end of the term edit's URL e.g.

https://definitio.div/engine/term/88?v=2

The story to use as a template will then be the one linked to above, under the term 'John.' The story itself lends itself to working on the dropcaps, either by automatically singling out the first character of the first para if it has for example more than three lines of text, or by adding to CKEditor the means (read button) to select a word and specify that it is to be displayed with a dropcap.

In addition
* Some fixed were made to the migration scripts for splitting/adding html/markup content in items
* Added migrations to do the same for definitions table
* Added the extra columns to the docblocks
* Added definitions look to term_edit
* Removed markup parsing of definitions on term's view template (we now expect the content to be, and we read it as, HTML)
* Added bulma extensions divider and timeline - although I am currently (and sadly) freezing all efforts to implement a vertical tube map like timeline to the edit process - it's not that easy to squeeze the control in in a meaningful way and simply having it there because it looks good is against the building principles of definitio as well as aginter.