Repo improvements

.github/CODEOWNERS

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+* @amgvu

.github/pull_request_template.md

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+**Why**
+
+<!-- Explain why this change is necessary and why it was completed -->
+
+---
+
+**What**
+
+<!-- State what changes are included in this pull request -->
+
+---
+
+**Verification**
+
+<!-- Describe how others can test and verify this feature -->

.github/workflows/CI.yml

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+name: CI
+
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node: [19, 20, 21]
+
+    steps:
+      - name: Checkout 🛎️
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+
+      - name: Setup Node 🎯
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ matrix.node }}
+
+      - name: Install dependencies 💿
+        run: npm ci
+
+      - name: Run linter ⚡
+        run: npm run lint
+
+      - name: Run build 🔨
+        run: npm run build

template.env

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+NEXT_PUBLIC_SUPABASE_URL=
+NEXT_PUBLIC_SUPABASE_KEY=
+NEXT_PUBLIC_BOT_API_URL=
+NEXTAUTH_SECRET=
+NEXTAUTH_ID=
+NEXTAUTH_URL=
+DISCORD_TOKEN=
+DISCORD_CLIENT_ID=
+DISCORD_GUILD_ID=
+DISCORD_CLIENT_SECRET=
+NEXT_PUBLIC_GEMINI_API_KEY=