Add typos for CI, include typos.toml

.github/workflows/main.yml

@@ -70,6 +70,15 @@ jobs:
       run: rustup update stable && rustup default stable && rustup component add rustfmt
     - run: cargo fmt --check
 
+  spelling:
+    name: Spell Check with Typos
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Actions Repository
+        uses: actions/checkout@v4
+      - name: Spell Check repo
+        uses: crate-ci/[email protected]
+
   gui:
     name: GUI tests
     runs-on: ubuntu-latest

CONTRIBUTING.md

@@ -99,6 +99,19 @@ Like formatting your code with `rustfmt`, running clippy regularly and before yo
     cargo clippy
     ```
 
+#### Finding typos with `typos-cli`
+
+[typos](https://github.com/crate-ci/typos) is a tool to check for typos in any of the repos files that are not whitelisted inside of `typos.toml`. It runs as a [GitHub Action](https://github.com/crate-ci/typos/blob/master/docs/github-action.md) as part of our CI.
+
+1. To install 
+    ```
+    cargo binstall -y typos
+    ```
+2. Running `typos`
+    ```
+    typos
+    ```
+
 ### Change requirements
 
 Please consider the following when making a change:

typos.toml

@@ -0,0 +1,14 @@
+[files]
+extend-exclude = [
+    "test_book/",
+    "*.css",
+    "tests/summary_md_files/the_book-2nd_edition.md",
+    "CHANGELOG.md",
+    "tests/parse_existing_summary_files.rs",
+    "src/front-end/fonts/fontawesome-webfont.svg",
+    "src/front-end/searcher/elasticlunr.min.js",
+    "src/front-end/playground_editor/ace.js",
+    "src/front-end/js/highlight.js",
+    "src/front-end/js/book.js",
+    "src/preprocess/links.rs",
+]