ci: check for typos

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/merge_requests/1170>

.gitlab-ci.yml

@@ -400,6 +400,14 @@ rustfmt:
     - cargo fmt --version
     - cargo fmt -- --color=always --check
 
+typos:
+  extends: .img-stable
+  stage: "lint"
+  rules:
+    - when: 'always'
+  script:
+    - typos
+
 gstwebrtc-api lint:
   image: node:lts
   stage: "lint"

typos.toml

@@ -0,0 +1,21 @@
+[default.extend-words]
+ND = "ND" # net/ndi
+encrypter = "encrypter"
+numer = "numer" # numerator
+paeth = "paeth"
+seeked = "seeked"
+
+# mux/mp4
+fiel = "fiel"
+trun = "trun"
+
+[files]
+extend-exclude = [
+    "*.mcc",
+    "*.ref",
+    "*.scc",
+    "net/webrtc/gstwebrtc-api/src/keysyms.js",
+    # third party code
+    "video/closedcaption/src/c/*",
+    "net/webrtc/gstwebrtc-api/third-party/*",
+]