Replace vaxis with zterm (#1)

Vaxis sadly cannot be used for applications which want to serve their contents via ssh to the (remote) user.

Instead I wrote my own tui library [zterm](https://gitea.yves-biener.de/yves-biener/zterm), which this tui application now uses. This will serve two purposes:
1. implement the tui application and be servable through ssh (see [wish-serve](https://gitea.yves-biener.de/yves-biener/wish-serve))
2. serve as documentation and showcase of an example application for **zterm**

Reviewed-on: #1

build.zig.zon

@@ -24,8 +24,8 @@
     // internet connectivity.
     .dependencies = .{
         .zlog = .{
-            .url = "git+https://gitea.yves-biener.de/yves-biener/zlog#73991389f6f4156e5ccbc6afd611bc34fe738a72",
-            .hash = "1220d86aec0bf263dd4df028e017f094f4c530cc2367a3cd031989bbe94f466da1e0",
+            .url = "git+https://gitea.yves-biener.de/yves-biener/zlog#87cd904c708bf47c0ecde51631328e7411563dcf",
+            .hash = "122055b153ca7493f2c5b34bcaa9dc40f7bfc2ead3d4880be023fbb99e3ec13d2827",
         },
         .vaxis = .{
             .url = "git+https://github.com/rockorager/libvaxis#e3062d62b60bf8a351f267a77e1a94e2614394aa",
@@ -35,6 +35,14 @@
             .url = "git+https://github.com/jetzig-framework/zmd#90e52429cacd4fdc90fd615596fe584ae40ec8e9",
             .hash = "12202a4edefedd52478223a44cdc9a3b41d4bc5cf3670497a48377f45ff16a5e3363",
         },
+        .zg = .{
+            .url = "https://codeberg.org/dude_the_builder/zg/archive/v0.13.2.tar.gz",
+            .hash = "122055beff332830a391e9895c044d33b15ea21063779557024b46169fb1984c6e40",
+        },
+        .zterm = .{
+            .url = "git+https://gitea.yves-biener.de/yves-biener/zterm#0cc0ed10d20feadd053aa2c573b73cd8d67edf71",
+            .hash = "122072281f3dab8b8ce7ce407def708010b5282b9e31d9c998346c9a0094f3b8648f",
+        },
     },
     .paths = .{
         "build.zig",