chore: generate countries.tsx from Go code (#15274)

Closes https://github.com/coder/coder/issues/15074

We have a hard-coded list of countries at
https://github.com/coder/coder/blob/main/site/src/pages/SetupPage/countries.tsx.
This means Go code in coder/coder doesn't have an easy way of utilizing
it.

## Solution
Generate countries.tsx from Go code. Generated by `scripts/apitypings`

scripts/typegen/codersdk.gotmpl

@@ -0,0 +1,30 @@
+// Code generated by typegen/main.go. DO NOT EDIT.
+package codersdk
+
+type RBACResource string
+
+const (
+	{{- range $element := . }}
+	Resource{{ pascalCaseName $element.FunctionName }} RBACResource = "{{ $element.Type }}"
+	{{- end }}
+)
+
+type RBACAction string
+
+const (
+	{{- range $element := actionsList }}
+	{{ $element.Enum }} RBACAction = "{{ $element.Value }}"
+	{{- end }}
+)
+
+// RBACResourceActions is the mapping of resources to which actions are valid for
+// said resource type.
+var RBACResourceActions = map[RBACResource][]RBACAction{
+	{{- range $element := . }}
+    Resource{{ pascalCaseName $element.FunctionName }}: {
+        {{- range $actionValue, $_ := $element.Actions }}
+            {{- actionEnum $actionValue -}},
+        {{- end -}}
+    },
+    {{- end }}
+}