feat: first version of bot (#2)

### Explanation

This should set up everything we need for our initial launch. Test coverage is at 100% to ensure nothing breaks.

### Issue

_No response_

### Attestations

- [x] I have read and agree to the [Code of Conduct](https://docs.nhcarrigan.com/community/coc/)
- [x] I have read and agree to the [Community Guidelines](https://docs.nhcarrigan.com/community/guide/).
- [x] My contribution complies with the [Contributor Covenant](https://docs.nhcarrigan.com/dev/covenant/).

### Dependencies

- [x] I have pinned the dependencies to a specific patch version.

### Style

- [x] I have run the linter and resolved any errors.
- [x] My pull request uses an appropriate title, matching the conventional commit standards.
- [x] My scope of feat/fix/chore/etc. correctly matches the nature of changes in my pull request.

### Tests

- [x] My contribution adds new code, and I have added tests to cover it.
- [ ] My contribution modifies existing code, and I have updated the tests to reflect these changes.
- [x] All new and existing tests pass locally with my changes.
- [x] Code coverage remains at or above the configured threshold.

### Documentation

Coming soon - I'm working on the infra for docs next

### Versioning

Major - My pull request introduces a breaking change.

Reviewed-on: https://codeberg.org/nhcarrigan/rig-task-bot/pulls/2
Co-authored-by: Naomi Carrigan <commits@nhcarrigan.com>
Co-committed-by: Naomi Carrigan <commits@nhcarrigan.com>

src/index.ts

@@ -3,3 +3,48 @@
  * @license Naomi's Public License
  * @author Naomi Carrigan
  */
+
+import { PrismaClient } from "@prisma/client";
+import { Client, Events, WebhookClient } from "discord.js";
+import { intents } from "./config/intents.js";
+import { onInteractionCreate } from "./events/onInteractionCreate.js";
+import { onReady } from "./events/onReady.js";
+import { validateEnvironmentVariables }
+  from "./utils/validateEnvironmentVariables.js";
+
+/**
+ * The entry point file. Handles starting up the application
+ * process and mounting the necessary event listeners.
+ */
+const boot = async(): Promise<void> => {
+  try {
+    const bot = {
+      database: new PrismaClient(),
+      discord:  new Client({ intents }),
+      env:      validateEnvironmentVariables(),
+    };
+
+    await bot.database.$connect();
+
+    bot.discord.on(Events.ClientReady, () => {
+      void onReady(bot);
+    });
+
+    bot.discord.on(Events.InteractionCreate, (interaction) => {
+      void onInteractionCreate(bot, interaction);
+    });
+
+    await bot.discord.login(bot.env.discordToken);
+  } catch (error) {
+    const hook = new WebhookClient({
+      url: process.env.DISCORD_DEBUG_WEBHOOK ?? "",
+    });
+    await hook.send({
+      content: `Error: ${JSON.stringify(error, null, 2)}`,
+    });
+  }
+};
+
+void boot();
+
+export { boot };