add configuration to control breadcrumb display

[thedumbtechguy]

Breadcrumbs Configuration

Plutonium allows you to control the visibility of breadcrumbs both globally and per page type. The configuration is inheritable, allowing you to set defaults for groups of resources while maintaining the ability to override specific pages when needed.

Usage

class AdminResourceDefinition < Plutonium::Definition::Base
  # Disable breadcrumbs globally for this resource and its subclasses
  breadcrumbs false
end

class UserDefinition < Plutonium::Definition::Base
  # Disable breadcrumbs only for specific pages
  index_page_breadcrumbs false
  new_page_breadcrumbs false
  
  # Other pages will inherit from global setting (default: true)
end

class ProductDefinition < AdminResourceDefinition
  # Override parent's setting for specific pages
  show_page_breadcrumbs true
  edit_page_breadcrumbs true
end

Configuration Options

Setting	Description	Default
breadcrumbs	Global setting for all pages	true
index_page_breadcrumbs	Control breadcrumbs on index page	inherits from breadcrumbs
new_page_breadcrumbs	Control breadcrumbs on new record page	inherits from breadcrumbs
edit_page_breadcrumbs	Control breadcrumbs on edit page	inherits from breadcrumbs
show_page_breadcrumbs	Control breadcrumbs on show page	inherits from breadcrumbs
interactive_action_page_breadcrumbs	Control breadcrumbs on interactive action pages	inherits from breadcrumbs

Inheritance Rules

1. Page-specific settings take precedence over the global setting
2. If a page-specific setting is not defined, it falls back to the global breadcrumbs setting
3. Both global and page-specific settings are inherited by subclasses
4. Subclasses can override any setting without affecting the parent class

Examples

Basic Configuration

class ResourceDefinition < Plutonium::Definition::Base
  # Set global default
  breadcrumbs false
end

Mixed Configuration

class ComplexResourceDefinition < Plutonium::Definition::Base
  # Disable globally
  breadcrumbs false
  
  # Enable for specific pages
  show_page_breadcrumbs true
  edit_page_breadcrumbs true
end

Inherited Configuration

# Base admin configuration
class AdminResourceDefinition < Plutonium::Definition::Base
  breadcrumbs false
end

# Inherits no breadcrumbs from AdminResourceDefinition
class UserAdminDefinition < AdminResourceDefinition
  # Override just the show page
  show_page_breadcrumbs true
end

[thedumbtechguy]

fixes: #12