Add typos configuration for spell checking

- Add _typos.toml with custom ignore rules for codebase-specific terms
- Ignore 'strat'/'Strat' as common variable names
- Ignore 'adnlp_backen'/'ipopt_backen' test fixtures
- Update SpellCheck workflow to use custom config

Author: ocots

.github/workflows/SpellCheck.yml

@@ -7,3 +7,5 @@ on:
 jobs:
   call:
     uses: control-toolbox/CTActions/.github/workflows/spell-check.yml@main
+    with:
+      config-path: '_typos.toml'

_typos.toml

@@ -0,0 +1,16 @@
+[default]
+locale = "en"
+extend-ignore-re = [
+    "adnlp_backen",
+    "ipopt_backen",
+    # Common variable names in our codebase
+    "strat",
+    "Strat",
+]
+
+[files]
+extend-exclude = [
+    "*.json",
+    "*.toml",
+    "*.svg",
+]