Fix docs deployment (#24)

* Fix docs deployment

Also adds codebase doc that was not included in reorg.

* Add tiles to C API index page

* Add sentence about each file in C API index cards.

docs/api_reference/c_api/index.md

@@ -6,10 +6,12 @@ https://github.com/acquire-project/acquire-zarr for more information.
 <div class="cards">
     <div class="card">
         <h4><pre>acquire.zarr.h</pre></h4>
+        <p>The primary header file that provides the main streaming functionality and settings configuration.</p>
         <a href="../../acquire_zarr_c_api/acquire_8zarr_8h" class="button">acquire.zarr.h</a>
     </div>
     <div class="card">
         <h4><pre>zarr.types.h</pre></h4>
+        <p>Contains all type definitions and enumerations used by the library.</p>
         <a href="../../acquire_zarr_c_api/zarr_8types_8h" class="button">zarr.types.h</a>
     </div>
 </div>