ci: migrate CI workflows to use bun

Switch from Node.js/npm to Bun in GitHub Actions workflows for improved performance. Updated security.yml and typecheck.yml workflows to use oven-sh/setup-bun@v1, bun install, bun audit, and bun run commands.

Author: involvex

.github/workflows/security.yml

@@ -15,17 +15,14 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Use Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: "18"
-          cache: "npm"
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
 
-      - name: Install Dependencies
-        run: npm ci
+      - name: Install dependencies
+        run: bun install
 
       - name: Run Security Audit
-        run: npm audit --audit-level=high
+        run: bun audit --audit-level=high
 
       - name: Scan for Secrets
         uses: trufflesecurity/trufflehog@v3.90.1

.github/workflows/typecheck.yml

@@ -13,14 +13,11 @@ jobs:
     steps:
       - uses: actions/checkout@v3
 
-      - name: Use Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: "18"
-          cache: "npm"
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v1
 
-      - name: Install Dependencies
-        run: npm ci
+      - name: Install dependencies
+        run: bun install
 
       - name: Run TypeScript Type Check
-        run: npm run typecheck
+        run: bun run typecheck