Port from fp/io-ts to effect-ts

As hoped, this seems to fix our build issues. And the port is pretty
straightforward; nearly doable with search-and-replace. Not yet
extensively tested but it seems to be working ...

package.json

@@ -1,5 +1,6 @@
 {
   "dependencies": {
+    "@effect/schema": "^0.62",
     "@pinia/nuxt": "^0.5.1",
     "@vueuse/core": "^10.5.0",
     "@vueuse/nuxt": "^10.1.2",
@@ -8,11 +9,10 @@
     "@wwtelescope/engine-helpers": "^0.16",
     "@wwtelescope/engine-pinia": "^0.9",
     "@wwtelescope/engine-types": "^0.6.4",
+    "effect": "^2.3",
     "ellipsize": "^0.1",
     "escape-html": "^1.0.3",
     "femtotween": "^2.0.3",
-    "fp-ts": "^2.13",
-    "io-ts": "^2.2",
     "keycloak-js": "~21.0.0",
     "less": "^4.1.3",
     "pinia": "^2.0.32",

tsconfig.json

@@ -2,6 +2,8 @@
   // https://nuxt.com/docs/guide/concepts/typescript
   "extends": "./.nuxt/tsconfig.json",
   "compilerOptions": {
-    "allowSyntheticDefaultImports": true
+    "allowSyntheticDefaultImports": true,
+    "exactOptionalPropertyTypes": true,
+    "strict": true
   }
 }