feat: Add Hackergarten JSail 2026 event

Add new event entry for Hackergarten JSail 2026 scheduled on 2026-06-10 at Zeilschool de Morra in Hemelum, Netherlands. Include associated achievements.

Author: Christian Kleinbölting

events.json

@@ -100,8 +100,7 @@
                 "url": "https://www.meetup.com/de-de/hackergarten-dortmund/events/312845289/"
             }
         ],
-        "achievements": [
-        ]
+        "achievements": []
     },
     {
         "date": "2026-07-07",
@@ -128,6 +127,24 @@
         ],
         "achievements": []
     },
+    {
+        "date": "2026-06-10",
+        "title": "Hackergarten JSail 2026",
+        "venue": "Zeilschool de Morra",
+        "address": "Buorren 31, 8584 VC Hemelum, Netherlands",
+        "links": [
+            {
+                "title": "JSail",
+                "url": "https://jsail.ijug.eu/"
+            }
+        ],
+        "achievements": [
+            {
+                "title": "jFun: Update build and Java 25",
+                "url": "https://github.com/seakayone/jfun/pull/1"
+            }
+        ]
+    },
     {
         "date": "2026-06-04",
         "venue": "CSS ICT Campus Zentralschweiz",
@@ -229,8 +246,7 @@
                 "url": "https://www.meetup.com/de-de/hackergarten-dortmund/events/312845285"
             }
         ],
-        "achievements": [
-        ]
+        "achievements": []
     },
     {
         "date": "2026-04-30",
@@ -370,10 +386,10 @@
                 "title": "discord-guild-configurator: Finish migration away from single script to separate application",
                 "url": "https://github.com/NMertsch/discord-guild-configurator/commit/2ea1f96f8b9d71077fd15060b106e10d90350f8c"
             },
-             {
+            {
                 "title": "QR Code TypeScript Migration, fixed tests on Windows",
                 "url": "https://github.com/Greenheart/qrcode/commit/640dec5c841b977c1be82f7d52991512e8979b9f"
-             },
+            },
             {
                 "title": "KeePassXC: troubleshoot dead keys input issue in the password field and submmit a bug report",
                 "url": "https://github.com/keepassxreboot/keepassxc/issues/13167"
@@ -548,7 +564,7 @@
         "achievements": [
             {
                 "title": "Komunumo: add multi-language help to Markdown editor",
-                "url":"https://github.com/McPringle/komunumo/issues/356"
+                "url": "https://github.com/McPringle/komunumo/issues/356"
             }
         ]
     },
@@ -577,8 +593,8 @@
         ],
         "achievements": []
     },
-  {
-       "date": "2025-11-26",
+    {
+        "date": "2025-11-26",
         "title": "Hackergarten Basel November 2025",
         "venue": "Karakun AG",
         "address": "Elisabethenanlage 25, 4051 Basel, Switzerland",
@@ -607,7 +623,6 @@
             {
                 "title": "Meetup",
                 "url": "https://www.meetup.com/hackergarten-luzern/events/ppbcstyhcpbjb/"
-
             }
         ],
         "achievements": []
@@ -622,9 +637,7 @@
                 "url": "https://www.meetup.com/hackergarten-stuttgart/events/304576939/"
             }
         ],
-        "achievements": [
-
-        ]
+        "achievements": []
     },
     {
         "date": "2025-11-04",
@@ -673,7 +686,7 @@
             }
         ]
     },
-        {
+    {
         "date": "2025-10-29",
         "title": "Hackergarten Basel October 2025",
         "venue": "Karakun AG",
@@ -784,7 +797,7 @@
             }
         ]
     },
-     {
+    {
         "date": "2025-09-04",
         "venue": "Karakun @ Digitale Werkbank Dortmund",
         "address": "Kanalstr. 25, 44147 Dortmund",
@@ -862,10 +875,12 @@
                 "url": "https://www.meetup.com/hackergarten-basel/events/309853513/"
             }
         ],
-        "achievements": [{
+        "achievements": [
+            {
                 "title": "biomedit/portal: make getting started guide in docs foolproof",
                 "url": "https://gitlab.com/biomedit/portal/-/merge_requests/1864"
-            }]
+            }
+        ]
     },
     {
         "date": "2025-08-07",
@@ -907,7 +922,6 @@
                 "title": "Komunumo: Support for custom logos.",
                 "url": "https://github.com/McPringle/komunumo/issues/204"
             }
-
         ]
     },
     {
@@ -4681,7 +4695,6 @@
                 "title": "Add a configurable nullValueInput attribute",
                 "url": "https://github.com/uniVocity/univocity-parsers/issues/322"
             },
-
             {
                 "title": "Container-based integration testing to be added",
                 "url": "https://github.com/tablevert/tablevert-core/issues/2"