feat!: Split site into public and private sections

Moved the Copper Chronicle and resume into a private git submodule
(src/private), visible only to authenticated users. Added a lock symbol
to the mdbook sidebar for restricted sections. Reorganized nginx/nix
configuration files into a dedicated folder. Removed one-line descriptions
from the menu. Reduced custom CSS to better align the main website's theme
with mdbook's native styling. Personalized the index and blog introduction
pages.

README.md

@@ -1,33 +1,15 @@
-# WWW
+# The Bin
 
-Www is my personal website, blog project, and portfolio page.
+This is my personal website, blog project, and portfolio page.
 It should be available at https://wwww.binning.dev
 
 # History
 
-## 2025-02-28
-
-I restarted this in [Rocket](https://rocket.rs) after yet another data loss event.
-
-## 2024-06-21
-
-I migrated from cgit to forgejo and from kuberentes to simply nginx.
-
-## 2023-10-07
-
-I merged the deployment repository into this one.
-I also moved to self-hosting at some point.
-
-## 2022-01-05
-
-I moved hosting to Vultr and moved to a Cobalt.
-One neat command to unhide files was:
-
-`for i in \.*; do if [ ${i} != '.' ] && [ ${i} != '..' ]; then mv {.,}${i/\./} ; fi; done;`
-
-## 2018-12-16
-
-I started this blog with [Namecheap][Namecheap], [Ruby][Ruby], [Jekyll][Jekyll], and [Github-Pages][Github-Pages].
+- 2025-02-28: I restarted this in [Rocket](https://rocket.rs) after yet another data loss event.
+- 2024-06-21: I migrated from cgit to forgejo and from kuberentes to simply nginx.
+- 2023-10-07: I merged the deployment repository into this one and moved to self-hosting.
+- 2022-01-05: I moved hosting to Vultr and moved to a Cobalt.
+- 2018-12-16: I started this blog with [Namecheap][Namecheap], [Ruby][Ruby], [Jekyll][Jekyll], and [Github-Pages][Github-Pages].
 
 [Namecheap]: https://www.namecheap.com/
 [Ruby]: https://www.ruby-lang.org/