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/tsconfig.json

@@ -0,0 +1,25 @@
+{
+	"compilerOptions": {
+		"strict": true,
+		"module": "commonjs",
+		"moduleResolution": "node",
+		"target": "es2019",
+		"lib": ["es2019", "es2020", "es2022.error"],
+		"removeComments": true,
+		"useUnknownInCatchVariables": false,
+		"forceConsistentCasingInFileNames": true,
+		"noImplicitAny": true,
+		"noImplicitReturns": true,
+		"noUnusedLocals": true,
+		"strictNullChecks": true,
+		"preserveConstEnums": true,
+		"esModuleInterop": true,
+		"resolveJsonModule": true,
+		"incremental": true,
+		"declaration": true,
+		"sourceMap": true,
+		"skipLibCheck": true,
+		"outDir": "./dist/"
+	},
+	"include": ["credentials/**/*", "nodes/**/*", "utils/**/*.ts", "nodes/**/*.json"]
+}