Add fw config model

[itdependsnetworks]

Can likely hold off reviewing until #332 is merged as this has both of those changes and will make it impossible to review

Can review

Closes: #186

Added the FirewallConfig model that will replace CapircaPolicy.
Added an Aerleon configuration generation workflow.
Added a management command to migrate data from CapircaPolicy to FirewallConfig.
Added a default_driver setting for choosing your primary strategy.
Changed the date generation process to match current data generation standards.
Added aerleon as a dependency.

[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
nautobot_firewall_models
__init__.py					48
choices.py
constants.py
details.py
filters.py
forms.py					973-978
homepage.py
jobs.py					71-93
tables.py
template_content.py					78-85
urls.py
nautobot_firewall_models/api
serializers.py
urls.py
views.py
nautobot_firewall_models/management/commands
capirca_to_fw_config_migration.py					48-50
nautobot_firewall_models/models
__init__.py
firewall_config.py					87
nautobot_firewall_models/utils
__init__.py					76-79, 133
aerleon.py					116, 219-223, 266-271, 389
capirca.py					57, 108
nautobot_firewall_models/views
__init__.py
firewall_config.py					29-32
Project Total

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