feat: initial scaffold — MokoSuiteNPO nonprofit management

Layer 2 add-on for MokoSuite CRM. Full nonprofit operations:

Schema (12 tables):
- Donors (extends CRM contacts with giving levels + lifetime stats)
- Donations (cash/check/card/ACH/stock/crypto/in-kind/pledge/matching)
- Pledges (installment tracking with fulfilment status)
- Funds (unrestricted/temporarily/permanently restricted/endowment)
- Campaigns (fundraising drives with goals and thermometers)
- Grants (prospect > writing > submitted > awarded > reporting lifecycle)
- Volunteers (skills, availability, background checks)
- Volunteer Hours (activity logging with approval)
- Memberships (levels, dues, auto-renew)
- Tax Receipts (IRS-compliant acknowledgment letters)
- Events (galas, auctions, community events with registration)
- Event Registrations (tickets, dietary, table assignment)

Helpers (4):
- DonorHelper: profiles, giving history, level auto-calculation, lapsed detection
- CampaignHelper: active campaigns, thermometer data, fundraising summary
- VolunteerHelper: registration, hours logging, skills matching, reporting
- TaxReceiptHelper: IRS-compliant receipt generation, year-end batch

Infrastructure:
- Joomla 6 architecture (PHP 8.3+, DI container, typed properties)
- Admin dashboard with fundraising thermometers + grant deadlines
- 6 webservice routes (donors, donations, campaigns, grants, volunteers, events)
- Package manifest with DLID update server
- GPL-3.0 license

source/script.php

@@ -0,0 +1,8 @@
+<?php
+defined('_JEXEC') or die;
+use Joomla\CMS\Installer\InstallerAdapter;
+class Pkg_mokosuitenpoInstallerScript
+{
+	public function preflight(string $type, InstallerAdapter $adapter): bool { return true; }
+	public function postflight(string $type, InstallerAdapter $adapter): void {}
+}