feat: Add AI tool building capabilities (#7336)

Github issue / Community forum post (link here to close automatically):
https://community.n8n.io/t/langchain-memory-chat/23733

---------

Signed-off-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Oleg Ivaniv <me@olegivaniv.com>
Co-authored-by: Val <68596159+valya@users.noreply.github.com>
Co-authored-by: Alex Grozav <alex@grozav.com>
Co-authored-by: कारतोफ्फेलस्क्रिप्ट™ <aditya@netroy.in>
Co-authored-by: Deborah <deborah@starfallprojects.co.uk>
Co-authored-by: Jesper Bylund <mail@jesperbylund.com>
Co-authored-by: Jon <jonathan.bennetts@gmail.com>
Co-authored-by: Michael Kret <88898367+michael-radency@users.noreply.github.com>
Co-authored-by: Giulio Andreini <andreini@netseven.it>
Co-authored-by: Mason Geloso <Mason.geloso@gmail.com>
Co-authored-by: Mason Geloso <hone@Masons-Mac-mini.local>
Co-authored-by: Mutasem Aldmour <mutasem@n8n.io>

packages/@n8n/nodes-langchain/gulpfile.js

@@ -0,0 +1,16 @@
+const path = require('path');
+const { task, src, dest } = require('gulp');
+
+task('build:icons', copyIcons);
+
+function copyIcons() {
+	const nodeSource = path.resolve('nodes', '**', '*.{png,svg}');
+	const nodeDestination = path.resolve('dist', 'nodes');
+
+	src(nodeSource).pipe(dest(nodeDestination));
+
+	const credSource = path.resolve('credentials', '**', '*.{png,svg}');
+	const credDestination = path.resolve('dist', 'credentials');
+
+	return src(credSource).pipe(dest(credDestination));
+}