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.

tests/fixtures/m2_reddit_info_empty.json

@@ -0,0 +1,11 @@
+{
+  "kind": "Listing",
+  "data": {
+    "after": null,
+    "dist": 0,
+    "modhash": "",
+    "geo_filter": "",
+    "before": null,
+    "children": []
+  }
+}