Allow for linking to multiple records

[pjsier]

This should be doable by updating createJoinKeyMap to generate an array of matching records instead of a single record in the call to reduce at the end:

airtable-block-link-by-fields/frontend/join.js

Lines 15 to 32 in 23ea0fa

	// Create a mapping of join key values to record IDs
	export const createJoinKeyMap = (records, fieldIds, caseSensitive, joinOnAll) =>
	records
	.map((record) =>
	createJoinKeys(record, fieldIds, caseSensitive, joinOnAll).map((key) => ({
	key,
	record,
	}))
	)
	.flat()
	.filter(({ key }) => key.length > 0)
	.reduce(
	(obj, { record, key }) => ({
	...obj,
	[key]: record,
	}),
	{}
	)