Updating dependent packages and plugin to run on install

Problem/Motivation

Packages/versions

Any site that already had BPMN 2.0 was going to run into issues installing this module if it's set to BPMN 3.0, per ECA's documentation.

By downgrading the requirement of BPMN from 3.0 it 2.0 in composer.json, the ECA module has to also be 3.0, we maintain compatibility with 10 while also being compatible with 11.x.

Plugin code

Out of the box, the module also throws WSOD errors whenever an ECA model to generate ai revision logs on entity presave has been created.

We need to change the module to make sure it can run correctly when installed.

Steps to reproduce

- Set up an anECA model to generate AI revision logs on entity presave
- Set up a content type
- Create a node of the new content type
- Note the WSOD

Proposed resolution

Change composer.json from `"drupal/bpmn_io": "^3.0",` to `"drupal/bpmn_io:^2.0"`

Remaining tasks

User interface changes

API changes

Data model changes