enable spell checking and fix some spelling errors

.vscode/ltex.dictionary.de-DE.txt

@@ -0,0 +1,4 @@
+Longtail
+Nimue
+Nael
+Täschi

.vscode/ltex.hiddenFalsePositives.de-DE.txt

@@ -0,0 +1 @@
+{"rule":"KOMMA_ZWISCHEN_HAUPT_UND_NEBENSATZ","sentence":"^\\QStromausfall morgens beim Frühstück und man bekommt keinen Kaffee ist allerdings schon nah an Folter.\\E$"}

.vscode/settings.json

@@ -0,0 +1,48 @@
+{
+    "cSpell.language": "de,de-DE",
+    "cSpell.enableFiletypes": [
+        "!asciidoc",
+        "!c",
+        "!cpp",
+        "!csharp",
+        "!css",
+        "!elixir",
+        "!erlang",
+        "!git-commit",
+        "!go",
+        "!graphql",
+        "!handlebars",
+        "!haskell",
+        "!html",
+        "!jade",
+        "!java",
+        "!javascript",
+        "!javascriptreact",
+        "!json",
+        "!jsonc",
+        "!jupyter",
+        "!latex",
+        "!less",
+        "!php",
+        "!plaintext",
+        "!pug",
+        "!python",
+        "!restructuredtext",
+        "!rust",
+        "!scala",
+        "!scminput",
+        "!scss",
+        "!swift",
+        "!text",
+        "!typescript",
+        "!typescriptreact",
+        "!vue",
+        "!yaml",
+        "!yml"
+    ],
+    "cSpell.words": [
+        "Nael",
+        "Nimue",
+        "Täschi"
+    ]
+}