Offer a case insensitive way to get a node by title or alias.

[nuthub]

Brief Abstract

I need a way to (programmatically) query for nodes without caring for capitalization.

Long Description

I'd like to query nodes from the database, whithout using a completion framework and without creating SQL statements on my own. The function org-roam-node-from-title-or-alias already does what I need, with the exception that I need the queries to be case insensitive. Adding COLLATE NOCASE to relevant queries would ignore capitalization.

Suggestion: Evaluating (org-roam-node-from-title-or-alias "foo" t) should return the node with title "Foo", while (org-roam-node-from-title-or-alias "foo") should not.

Proposed Implementation (if any)

See Pull Request.
The patch adds an optional parameter that, if set to non-nil, modifies the queries to be case insensitive. This change is backward compatible and does not break anything that already exists.

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