build: 🔨 add spell checker to justfile (#60)

## Description

This adds a spell checker to the justfile.

Closes #9

Doesn't need a review, but will wait a bit on the one PR in Sprout.

Author: lwjohnst86

.typos.toml

@@ -0,0 +1,9 @@
+[files]
+extend-exclude = [
+  "*.json",
+  "*.css",
+  ".quarto/*",
+  "_site/*",
+  "_extensions/*",
+  ".coverage-report/*"
+]

justfile

@@ -2,7 +2,7 @@
     just --list --unsorted
 
 # Run all build-related recipes in the justfile
-run-all: install-deps format-python check-python test-python check-security check-commits build-website
+run-all: install-deps format-python check-python test-python check-security check-spelling check-commits build-website
 
 # Install Python package dependencies
 install-deps:
@@ -50,3 +50,7 @@ check-commits:
 # Run basic security checks on the package
 check-security:
   uv run bandit -r src/
+
+# Check for spelling errors in files
+check-spelling:
+  uv run typos