create agent (#6520)

Added the create agent. Use [these
prompts](https://github.com/Stirling-Tools/Stirling-PDF-SaaS/blob/main/docgen/backend/default_templates/sample_prompts.md)
to test or try your own :)

Here’s the one I use

```
Hey, I need to generate an employee expense report for reimbursement.
Company: Summit Consulting Partners Company address: 88 Riverside Plaza, Suite 1400, New York, NY 10069 Accounting department email: [email protected]
Employee details:
* Employee Name: Michael Tran
* Employee ID: EMP-1047
* Department: Client Services
* Report Date: January 20th, 2026
* Reporting Period: January 5th, 2026 – January 16th, 2026
* Manager Approver: Laura Simmons
Trip purpose: Client onsite meetings with Atlantic Energy Solutions in Boston, MA.
Expense items:
* Flight (NYC to Boston roundtrip) — $325.40 — January 5th, 2026 — Airline ticket
* Hotel (3 nights at Harborview Hotel) — $822.75 — January 5th-8th, 2026
* Taxi from airport to hotel — $48.00 — January 5th, 2026
* Client dinner (3 attendees) — $186.20 — January 6th, 2026
* Parking at JFK Airport — $72.00 — January 5th-8th, 2026
* Breakfast (per diem not used) — $18.50 — January 7th, 2026
* Uber to client office — $22.10 — January 7th, 2026
* Printing + presentation materials — $46.90 — January 8th, 2026
* Lunch with client — $39.75 — January 8th, 2026
* Office supplies (notebooks, pens) — $27.60 — January 10th, 2026
* Mileage reimbursement (client visit in NJ, 42 miles @ $0.67/mile) — $28.14 — January 14th, 2026
* Team lunch meeting (internal) — $64.30 — January 15th, 2026
Reimbursement method should be direct deposit.
Add a notes section stating: "All receipts attached. Expenses are business-related and comply with company travel policy."
```

---------

Co-authored-by: Anthony Stirling <[email protected]>

engine/uv.lock

@@ -604,6 +604,7 @@ version = "0.1.0"
 source = { editable = "." }
 dependencies = [
     { name = "fastapi" },
+    { name = "jinja2" },
     { name = "opentelemetry-sdk" },
     { name = "pgvector" },
     { name = "posthog" },
@@ -630,6 +631,7 @@ dev = [
 [package.metadata]
 requires-dist = [
     { name = "fastapi", specifier = ">=0.116.0" },
+    { name = "jinja2", specifier = ">=3.1.0" },
     { name = "opentelemetry-sdk", specifier = ">=1.39.0" },
     { name = "pgvector", specifier = ">=0.3.6" },
     { name = "posthog", specifier = ">=3.0.0" },