Cicdstatemgr

* document/refine support for the `list` datatype for the `--set` argument
* i.e. `--set some.path.myset[]=e,f,g,e` = [e,f,g,e]
* any subsequent `--set` calls to same key act as an add/extension to existing values
* `--set some.path.myset[]=[]` clears any pre-existing values

* add support for the `set` datatype (no-duplicates list) for the `--set` argument
* i.e. `--set some.path.myset{}=e,f,g,e` = [e,f,g]
* any subsequent `--set` calls to same key act as an add/extension to existing values
* `--set some.path.myset{}=[]` clears any pre-existing values

* add support for toggling any `event-handlers:` sub entry in a derivative via `enabled: False` See 4

* jinja2 parse error include original non-macro prefixed template
* parse `to` on set-values handlers
* add `from_json` jinja2 filter
* all CLI env var names change prefix from `CICDOPS_` to `CICDSTATEMGR_`

* fix `--get` when `get_via_jsonng_expression()` has jsonpath parse error. return literal expression as the value

* fix `--get` value parse handling where right hand side is not an expression, return literal value on no-match

* documentation
* log statement level clarity
* added `latest` docker tag
* fix `setup.py` for dependencies