ci: add codespell

Signed-off-by: Kir Kolyshkin <[email protected]>

Author: kolyshkin

.codespellrc

@@ -0,0 +1,2 @@
+[codespell]
+skip = ./.git,./go.sum,./go-selinux/testdata

.github/workflows/validate.yml

@@ -39,6 +39,16 @@ jobs:
         with:
           version: v1.54
 
+  codespell:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v3
+    - name: install deps
+      # Version of codespell bundled with Ubuntu is way old, so use pip.
+      run: pip install codespell
+    - name: run codespell
+      run: codespell
+
   cross:
     runs-on: ubuntu-20.04
     steps:

pkg/pwalkdir/README.md

@@ -51,4 +51,4 @@ filepath.WalkDir.
 Otherwise (if a WalkDirFunc is actually doing something) this is usually
 faster, except when the WalkDirN(..., 1) is used. Run `go test -bench .`
 to see how different operations can benefit from it, as well as how the
-level of paralellism affects the speed.
+level of parallelism affects the speed.