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/.prettierrc.js

@@ -0,0 +1,51 @@
+module.exports = {
+	/**
+	 * https://prettier.io/docs/en/options.html#semicolons
+	 */
+	semi: true,
+
+	/**
+	 * https://prettier.io/docs/en/options.html#trailing-commas
+	 */
+	trailingComma: 'all',
+
+	/**
+	 * https://prettier.io/docs/en/options.html#bracket-spacing
+	 */
+	bracketSpacing: true,
+
+	/**
+	 * https://prettier.io/docs/en/options.html#tabs
+	 */
+	useTabs: true,
+
+	/**
+	 * https://prettier.io/docs/en/options.html#tab-width
+	 */
+	tabWidth: 2,
+
+	/**
+	 * https://prettier.io/docs/en/options.html#arrow-function-parentheses
+	 */
+	arrowParens: 'always',
+
+	/**
+	 * https://prettier.io/docs/en/options.html#quotes
+	 */
+	singleQuote: true,
+
+	/**
+	 * https://prettier.io/docs/en/options.html#quote-props
+	 */
+	quoteProps: 'as-needed',
+
+	/**
+	 * https://prettier.io/docs/en/options.html#end-of-line
+	 */
+	endOfLine: 'lf',
+
+	/**
+	 * https://prettier.io/docs/en/options.html#print-width
+	 */
+	printWidth: 100,
+};