feat: add spellcheck

cspell.json

@@ -0,0 +1,40 @@
+{
+    "language": "en-GB",
+    "allowCompoundWords": true,
+    "dictionaries": [
+        "en-gb",
+        "companies",
+        "softwareTerms",
+        "typescript",
+        "node",
+        "html",
+        "css",
+        "bash"
+    ],
+    "ignoreRegExpList": [
+        "```[\\s\\S]*?```", // Ignores multi-line code blocks in Markdown
+        "`[^`\n]+`" // Ignores inline code blocks
+    ],
+    "words": [
+        "Cthulu's",
+        "debaucherous",
+        "Faer",
+        "Fenrir",
+        "Gitea",
+        "LGBTQ",
+        "Lich",
+        "Migadu",
+        "neopronouns",
+        "NHCarrigan",
+        "Norns",
+        "R'lyeh",
+        "Rythm",
+        "schadenfreude",
+        "strobing",
+        "Unseelie",
+        "vaxry",
+        "waaaaaay",
+        "Wyrm",
+        "Wyrms"
+    ]
+}