feat: Validation Plugin (#2451)

* Plugins/Permissions: FIX PARITY ISSUES
What is parity issues? Parity issues are files that exist but structured one way in the base/vanilla discordeno library, and structured another way in the permisison plugin.

* deno fmt

* plugins/permissions: nuke validations

* plugins/permissions VALIDATIONS -> plugins/validations

* plugins/validations: slash commands max 4000 chars

* fix module not found

plugins/validations/src/applicationCommandOptions.ts

@@ -0,0 +1,54 @@
+import { ApplicationCommandOption, ApplicationCommandOptionTypes, Bot } from "../deps.ts";
+
+export function validateApplicationCommandOptions(bot: Bot, options: ApplicationCommandOption[]) {
+  const requiredOptions: ApplicationCommandOption[] = [];
+  const optionalOptions: ApplicationCommandOption[] = [];
+
+  for (const option of options) {
+    option.name = option.name.toLowerCase();
+
+    if (option.choices?.length) {
+      if (option.choices.length > 25) throw new Error("Too many application command options provided.");
+
+      if (
+        option.type !== ApplicationCommandOptionTypes.String && option.type !== ApplicationCommandOptionTypes.Integer
+      ) {
+        throw new Error("Only string or integer options can have choices.");
+      }
+    }
+
+    if (!bot.utils.validateLength(option.name, { min: 1, max: 32 })) {
+      throw new Error("Invalid application command option name.");
+    }
+
+    if (!bot.utils.validateLength(option.description, { min: 1, max: 100 })) {
+      throw new Error("Invalid application command description.");
+    }
+
+    option.choices?.every((choice) => {
+      if (!bot.utils.validateLength(choice.name, { min: 1, max: 100 })) {
+        throw new Error("Invalid application command option choice name. Must be between 1-100 characters long.");
+      }
+
+      if (
+        option.type === ApplicationCommandOptionTypes.String &&
+        (typeof choice.value !== "string" || choice.value.length < 1 || choice.value.length > 100)
+      ) {
+        throw new Error("Invalid slash options choice value type.");
+      }
+
+      if (option.type === ApplicationCommandOptionTypes.Integer && typeof choice.value !== "number") {
+        throw new Error("A number must be set for Integer types.");
+      }
+    });
+
+    if (option.required) {
+      requiredOptions.push(option);
+      continue;
+    }
+
+    optionalOptions.push(option);
+  }
+
+  return [...requiredOptions, ...optionalOptions];
+}