extensions: add aiolabs splitpayments fork (v1.1.0-aio.1)

First aiolabs build off lnbits/splitpayments v1.1.0 via the
PatMulligan fork (org rename + uv migration + wallet-select +
typo fixes). No upstream entry to keep — splitpayments wasn't
previously listed.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

extensions.json

@@ -263,6 +263,17 @@
             "archive": "https://git.atitlan.io/aiolabs/lnurlp/archive/v1.3.0-aio.1.zip",
             "hash": "1b3b982aea53d7935a551fd069efd8ba0f362834494cef14c115ae38b6b54a08"
         },
+        {
+            "id": "splitpayments",
+            "repo": "https://git.atitlan.io/aiolabs/splitpayments",
+            "name": "Split Payments",
+            "min_lnbits_version": "1.3.0",
+            "version": "1.1.0-aio.1",
+            "short_description": "Split incoming payments across wallets",
+            "icon": "https://git.atitlan.io/aiolabs/splitpayments/raw/branch/main/static/image/split-payments.png",
+            "archive": "https://git.atitlan.io/aiolabs/splitpayments/archive/v1.1.0-aio.1.zip",
+            "hash": "dcde1f1127810a3b8655e07eb5b4b789e4cc787c8ceee7be2d7f7921edc2df99"
+        },
         {
             "id": "restaurant",
             "repo": "https://git.atitlan.io/aiolabs/restaurant",