CI & PR Build Triggers (#255)

* adding schema for triggers.

* save point for expand on the build triggers

* fix typo add trigger to test

* save point

* fix plural. update include/exclude to be string array not string.

* everything except sort order

* got include/exclude branch filters.

* save point

* remove var. add optional branch filter and required branch filter. flatten all except path filter. add missing return. convert branch filter set to return only 1. fix type *int.

* got ci_trigger wired up

* almost have pr trigger

* fix test

* fix type so test will pass.

* fix unit tests

* add missing optional. make branch filter optional. fix syntax for index 0. fix nested types are NOT pointers.

* re-order methods. remove Convert.* from nested non strong typed interfaces. use float64 vs int.

* more type conversions.

* ugh terraform defaults are dumb.

* v1

* remove notes

* remove incomplete triggers

* update documentation. add default to 1.

* remove incomplete triggers. lint

* remove note

* move expand string to helper. added initial branch to satisfy api and allow user to set.

* use list over set on min 1 max 1. keeps the tf apply clean w/o creating custom ids

* sorting moved to the test only.

Co-authored-by: Kalarrs Topham <k-dawg-klakr@hotmail.com>

Author: Kalarrs Topham