Add typos to CI (#1158)

Hi all!

This CL fixes #1093:
* Avoids including current false-positives in the checking of typos
* Excludes localization-related files, as `typos` works with
  English words
* Fixes existing typos caught in the repo

Tested this in CI with a typo and it showed up in the list of actions!

---------

Co-authored-by: Martin Geisler <martin@geisler.net>

.github/typos.toml

@@ -0,0 +1,16 @@
+[default.extend-identifiers]
+# False positives.
+mis = "mis"
+MIS = "MIS"
+inout = "inout"
+BARs = "BARs"
+
+[type.po]
+# Localized content should not be checked for typos. English
+# in these files should be validated manually.
+extend-glob = ["*.po"]
+check-file = false
+
+[files]
+# Typos in third party packages should be fixed upstream.
+extend-exclude = ["third_party/*"]

.github/workflows/build.yml

@@ -24,6 +24,11 @@ jobs:
       - name: Check formatting
         uses: dprint/check@v2.2
 
+      - name: Check for typos
+        uses: crate-ci/typos@v1.16.9
+        with:
+          config: ./.github/typos.toml
+
   cargo:
     strategy:
       matrix: