feat: Add spell action

.cspell.json

@@ -50,11 +50,13 @@
         "kieranr",
         "lampadaferens",
         "nukepaid",
+        "organising",
         "Ouroboros",
         "paidmember",
         "robsoc",
         "studentname",
         "studentnumber",
+        "Tldr",
         "usefullinks",
         "welcomechannel"
     ]

.github/workflows/spell.yml

@@ -0,0 +1,11 @@
+name: 'Check Spelling'
+on: # rebuild any PRs and main branch changes
+  pull_request:
+  push:
+
+jobs:
+  spellcheck: # run the action
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: streetsidesoftware/cspell-action@v2.13.0