Initial commit: The Daily EPUB full implementation

Full implementation of a personalized daily newspaper delivered as an
EPUB.

Articles are pulled from a local self-hosted Miniflux instance, enriched
with comments, summarized and filtered by DeepSeek AI, and then
assembled into two EPUB editions: standard and optimized for the Xteink
X4 e-ink reader. Both are served by the local self-hosted BookOrbit OPDS
server in a separate library. Then the X4 edition is futher converted to
XTC format and served over a separate OPDS server hosted by the Rust
binary. Runs are tracked in a local SQLite database so runs are
idempotent per date.

Full documentation of the plan is in docs/plans and setup and install
instructions are in the README.md file.

src/epub/templates/in_this_issue.xhtml

@@ -0,0 +1,20 @@
+{% extends "base.xhtml" %}
+{% block body_class %}in-this-issue{% endblock %}
+{% block content %}
+      <h1>In This Issue</h1>
+      <p class="stats">{{ stats_line }}</p>
+{% for section in sections %}
+      <h2 class="index-section">{{ section.name }}</h2>
+      <ul class="index-list">
+{% for entry in section.entries %}
+        <li class="index-entry">
+          <p class="index-title"><a href="{{ entry.href }}">{{ entry.title }}</a></p>
+          <p class="index-meta">{{ entry.source }} &#183; {{ entry.reading_minutes }} min read</p>
+{% if !entry.summary.is_empty() %}
+          <p class="index-summary">{{ entry.summary }}</p>
+{% endif %}
+        </li>
+{% endfor %}
+      </ul>
+{% endfor %}
+{% endblock %}