Lint: Check spelling on CI but don't fail (#3080)

Check spelling on CI (no fail), fix typo in docs, ignore some others

.codespell/exclude-file.txt

@@ -7,3 +7,11 @@
 
     Error-de_DE=Wenn ist das Nunstück git und Slotermeyer?
      Ja! Beiherhund das Oder die Virtualenvironment gersput!
+
+<https://devguide.python.org/pullrequest/#licensing>`__
+
+    class ClassE[T: [str, int]]: ...  # Type checker error: illegal expression form
+    class ClassE[T: t1]: ...  # Type checker error: literal tuple expression required
+
+explicitly declared using ``in``, ``out`` and ``inout`` keywords.
+|            |          |         |        |          |           | inout     |

.codespell/ignore-words.txt

@@ -6,7 +6,9 @@ ba
 clos
 complies
 crate
+dedented
 extraversion
+falsy
 fo
 iif
 nd

.github/workflows/lint.yml

@@ -18,3 +18,8 @@ jobs:
 
       - name: Run pre-commit hooks
         uses: pre-commit/action@v3.0.0
+
+      - name: Check spelling
+        uses: pre-commit/action@v3.0.0
+        with:
+          extra_args: --all-files --hook-stage manual codespell || true

docs/rendering_system.rst

@@ -153,7 +153,7 @@ the footer (source link and last modified timestamp).
 3.5 Prepare for writing
 ''''''''''''''''''''''''
 
-``pep_html_builder.FileBuilder.prepare_writing`` initialises the bare miniumum
+``pep_html_builder.FileBuilder.prepare_writing`` initialises the bare minimum
 of the Docutils writer and the settings for writing documents.
 This provides a significant speed-up over the base Sphinx implementation, as
 most of the data automatically initialised was unused.