feat: add product documentation (#8)

### Explanation

Finally.

### Issue

_No response_

### Attestations

- [ ] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [ ] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [ ] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [ ] I have pinned the dependencies to a specific patch version.

### Style

- [ ] I have run the linter and resolved any errors.
- [ ] My pull request uses an appropriate title, matching the conventional commit standards.
- [ ] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [ ] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [ ] All new and existing tests pass locally with my changes.
- [ ] Code coverage remains at or above the configured threshold.

### Documentation

_No response_

### Versioning

_No response_

Reviewed-on: #8
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

.cspell.json

@@ -34,7 +34,37 @@
     "Musicolet"
   ],
   "words": [
+    "Abalise",
+    "atproto",
+    "Becca",
+    "Beccalia",
+    "CCPA",
+    "Celestine",
+    "Čeština",
+    "Dansk",
     "Fediverse",
-    "polycule"
+    "Français",
+    "Gitea",
+    "Hikari",
+    "Italiano",
+    "Iuvo",
+    "Lietuvių",
+    "Lyria",
+    "Mommy",
+    "Nederlands",
+    "Polski",
+    "polycule",
+    "Română",
+    "Rosalia",
+    "Sakura",
+    "Suomi",
+    "Svenska",
+    "Taryne",
+    "Türkçe",
+    "Ελληνικά",
+    "Български",
+    "Русский",
+    "Українська",
+    "हिन्दी"
   ]
 }