feat: yazi extra shortcuts

# Changes
## docs:
- Add extra tutorial docs
## Features:
- Add `pdf combine` to yazi
- Add `pdf normalization` to yazi
- Add `Markdown to html` to yazi
## Breaking Changes:
- Rename sops secret `wireguard/conf` to `wireguard/wg0.conf`: Make sure
update your `sops-conf.nix` and secrets file.

docs/yazi.md

@@ -0,0 +1,16 @@
+# Yazi Extra Shortcuts
+
+| Shortcuts | Description                                            |
+| --------- | ------------------------------------------------------ |
+| gc        | Show \[g\]it file \[c\]hanges                          |
+| +         | Zoom in image                                          |
+| -         | Zoom out image                                         |
+| M         | \[M\]ount manager                                      |
+| T         | \[T\]oggle preview panel                               |
+| y         | Copy to system clipboard while yanking                 |
+| gr        | Go back to \[g\]it \[r\]oot                            |
+| cD        | Drag and \[D\]rop                                      |
+| !         | Start Terminal                                         |
+| Fpc       | \[F\]ile: \[p\]df \[c\]ombine                          |
+| Fpn       | \[F\]ile: \[p\]df \[n\]ormalizing (Convert size to A4) |
+| Fmh       | \[F\]ile: \[m\]arkdown to \[h\]tml                     |