Custom breadcrumbs

[csjh]

Description

Enables custom handling of breadcrumb naming via frontmatter

Example (from test-env):

---
breadcrumb: "SELECT first_name || ' ' || last_name || '''s ' || order_month || ' Order' as breadcrumb FROM orders WHERE id = '{params.order_id}'"
---

Order #{params.order_id}

Checklist

• I have added a changeset
• I have added to the docs where applicable

[changeset-bot]

🦋 Changeset detected

Latest commit: b003c04

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
@evidence-dev/evidence	Major
@evidence-dev/core-components	Minor
my-evidence-project	Patch
evidence-test-environment	Patch
@evidence-dev/components	Patch

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[hughess]

I think the build error is coming from linking to parent directories that don't have an index page

[archiewood]

Suggested change

	breadcrumb: "SELECT first_name || ' ' || last_name || '''s ' || order_month || ' Order' as breadcrumb FROM orders WHERE id = '{params.order_id}'"
	breadcrumb: "SELECT first_name || ' ' || last_name || '''s ' || order_month || ' Order' as breadcrumb FROM orders WHERE id = '${params.order_id}'"

does this need a $

if not then it diverges from our SQL APIs elsewhere