Default to SQLite rather than Postgres & Redis (#72)

* Initial rough draft switch to sqlite.

* Rewrote cache implemenation.

* Provide typed tasks.

* Task cleanup.

* Use same db for tasks.

* Provide task queue registration and service container injection.

* Added optional delay to tasks. Pool buffers when encoding.

* Added tests for the task client and runner.

* Added handler examples for caching and tasks.

* Cleanup and documentation.

* Use make in workflow.

* Updated documentation.

* Updated documentation.

templates/pages/cache.gohtml

@@ -0,0 +1,36 @@
+{{define "content"}}
+    <form id="task" method="post" hx-post="{{url "cache.submit"}}">
+        <article class="message">
+            <div class="message-header">
+                <p>Test the cache</p>
+            </div>
+            <div class="message-body">
+                This route handler shows how the default in-memory cache works. Try updating the value using the form below and see how it persists after you reload the page.
+                HTMX makes it easy to re-render the cached value after the form is submitted.
+            </div>
+        </article>
+
+        <label for="value" class="label">Value in cache: </label>
+        {{if .Data}}
+            <span class="tag is-success">{{.Data}}</span>
+        {{- else}}
+            <i>(empty)</i>
+        {{- end}}
+        <br/><br/>
+
+        <div class="field">
+            <label for="value" class="label">Value</label>
+            <div class="control">
+                <input id="value" name="value" class="input" value="{{.Form.Value}}"/>
+            </div>
+        </div>
+
+        <div class="field is-grouped">
+            <div class="control">
+                <button class="button is-link">Update cache</button>
+            </div>
+        </div>
+
+        {{template "csrf" .}}
+    </form>
+{{end}}