Improved internal links and adopt zig highlight

content/docs/architecture/keybind.smd

@@ -39,7 +39,7 @@ key/combos and add an array, where the first element is the combination
 to map to the commands that will be invoked, the array accepts strings
 like in
 
-```js
+```zig
 ["ctrl+alt+shift+p", "open_command_palette"]
 ```
 
@@ -122,7 +122,7 @@ its results to a *scratch buffer* called `test`.
 
 The original definition is:
 
-```js
+```zig
 ["f5", ["create_scratch_buffer", "*test*"], ["shell_execute_insert", "zig", "build", "test"]],
 ```
 
@@ -139,7 +139,7 @@ a shell command called `zig` with the parameters `build` and `test`;
 if you don't have zig installed, it will not work, and you might
 want to remap `f5` to a different shell command.
 
-```
+```zig
 [
   "f5",
   [
@@ -174,6 +174,7 @@ flow.
 
 
 * Making flow even better with [tests](/docs/testing)
-* [How to contribute](/docs/contributing)
-* [Get in touch](https://discord.com/invite/4wvteUPphx) to share your
-combos
+* Adding [new commands](/docs/architecture/command)
+* [Contributing](/docs/contributing)
+* [Getting in touch](https://discord.com/invite/4wvteUPphx) to share
+your combos