feat: add boolean field type support to configuration schema

[larsroettig]

Adds a new 'boolean' field type to the business configuration schema, allowing toggle fields to accept true/false values. Updates the config action endpoint to accept boolean values alongside strings and string arrays.

Description

• Adds a new boolean field type to the FieldSchema variant, with an optional default value
• Updates the config POST endpoint to accept boolean values in addition to string and string[]
• Updates BusinessConfigSchemaField type comment to reflect the new field type
• Adds test fixtures and unit tests covering boolean fields with default: true, default: false, no default, and invalid (non-boolean) default values

Supports now

	import { defineConfig } from "@adobe/aio-commerce-lib-app/config";

	export default defineConfig({
		metadata: {
			id: "aio-config-test",
			displayName: "AIO Config Test",
			version: "1.4.0",
			description:
				"Test project for Adobe Commerce App Builder configuration API",
		},
		businessConfig: {
			schema: [
				{
					type: "boolean",
					label: "Enable true default",
					description: "Enable the feature",
					name: "enable_true_default",
					default: true,
				},
				{
					type: "boolean",
					label: "Enable true no default",
					description: "Enable the feature",
					name: "enable_true",
				},
				{
					type: "boolean",
					label: "Enable false default",
					description: "Enable the feature",
					name: "enable_false",
					default: false,
				}
			],
		},
	});

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have read the DEVELOPMENT document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[Copilot]

Pull request overview

Adds first-class boolean support to the business configuration schema so config UIs/actions can represent toggle fields with optional boolean defaults.

Changes:

• Adds a boolean variant to FieldSchema (with optional default) and updates related schema type docs.
• Extends the app config POST body validation to accept boolean values.
• Adds fixtures + unit tests for boolean schema validation (true/false/no default + invalid default).

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
packages/aio-commerce-lib-config/test/unit/schema/validator.test.ts	Adds unit tests validating the new boolean field schema behavior.
packages/aio-commerce-lib-config/test/fixtures/configuration-schema.ts	Extends the valid schema fixture with boolean fields.
packages/aio-commerce-lib-config/source/modules/schema/types.ts	Updates schema field type documentation to mention boolean.
packages/aio-commerce-lib-config/source/modules/schema/fields.ts	Introduces BooleanSchema and registers it in FieldSchema variant.
packages/aio-commerce-lib-app/source/actions/config.ts	Accepts boolean values in POST /config request validation.

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[jnatherley]

LGTM - Please update with changes from main branch