add pico8, update dev docs, new add-app CLI tool, add validation tool

src/applications.json

@@ -199,7 +199,6 @@
       ],
       "overrideSource": "GitHub",
       "meta": {
-        "includeInStandard": true,
         "includeInDualScreen": false
       }
     },
@@ -546,8 +545,7 @@
       "overrideSource": "GitHub",
       "allowIdChange": false,
       "meta": {
-        "includeInStandard": false,
-        "includeInDualScreen": true
+        "includeInStandard": false
       }
     },
     {
@@ -563,8 +561,7 @@
       "overrideSource": "GitHub",
       "allowIdChange": false,
       "meta": {
-        "includeInStandard": false,
-        "includeInDualScreen": true
+        "includeInStandard": false
       }
     },
     {
@@ -579,6 +576,18 @@
       ],
       "overrideSource": "GitHub",
       "allowIdChange": true
+    },
+    {
+      "id": "io.wip.pico8",
+      "url": "https://github.com/Macs75/pico8-android",
+      "author": "Macs75",
+      "name": "Pico8 Android",
+      "preferredApkIndex": 0,
+      "additionalSettings": "{\"includePrereleases\":false,\"fallbackToOlderReleases\":true,\"filterReleaseTitlesByRegEx\":\"\",\"filterReleaseNotesByRegEx\":\"\",\"verifyLatestTag\":false,\"sortMethodChoice\":\"date\",\"useLatestAssetDateAsReleaseDate\":false,\"releaseTitleAsVersion\":false,\"trackOnly\":false,\"versionExtractionRegEx\":\"\",\"matchGroupToUse\":\"\",\"versionDetection\":true,\"releaseDateAsVersion\":false,\"useVersionCodeAsOSVersion\":false,\"apkFilterRegEx\":\"\",\"invertAPKFilter\":false,\"autoApkFilterByArch\":true,\"appName\":\"\",\"appAuthor\":\"\",\"shizukuPretendToBeGooglePlay\":false,\"allowInsecure\":false,\"exemptFromBackgroundUpdates\":false,\"skipUpdateNotifications\":false,\"about\":\"\",\"refreshBeforeDownload\":false}",
+      "categories": [
+        "Emulator"
+      ],
+      "overrideSource": "GitHub"
     }
   ],
   "settings": {