ci: add security scan workflows and funding config

- Add CodeQL workflow for Go code analysis on push, PR, and weekly schedule
- Add Trivy security scan for vulnerability, secret, and misconfig detection
- Add GitHub funding configuration with PayPal link

Author: appleboy

.github/FUNDING.yml

@@ -0,0 +1,13 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+otechie: # Replace with a single Otechie username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+custom: ['https://www.paypal.me/appleboy46']

.github/workflows/codeql.yml

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+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [main]
+  schedule:
+    - cron: "41 23 * * 6"
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      contents: read
+      security-events: write
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: ["go"]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python', 'ruby' ]
+        # Learn more about CodeQL language support at https://git.io/codeql-language-support
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      # Initializes the CodeQL tools for scanning.
+      - name: Initialize CodeQL
+        uses: github/codeql-action/init@v4
+        with:
+          languages: ${{ matrix.language }}
+          # If you wish to specify custom queries, you can do so here or in a config file.
+          # By default, queries listed here will override any specified in a config file.
+          # Prefix the list here with "+" to use these queries and those in the config file.
+          # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+      - name: Perform CodeQL Analysis
+        uses: github/codeql-action/analyze@v4

.github/workflows/security.yml

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+name: Trivy Security Scan
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  schedule:
+    - cron: "0 0 * * *" # Daily scan at midnight UTC
+  workflow_dispatch: # Allow manual trigger
+
+jobs:
+  trivy-scan:
+    name: Trivy Security Scan
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      security-events: write
+      actions: read
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v6
+
+      - name: Run Trivy vulnerability scanner in repo mode
+        uses: aquasecurity/trivy-action@0.35.0
+        with:
+          scan-type: "fs"
+          scan-ref: "."
+          format: "sarif"
+          output: "trivy-results.sarif"
+          severity: "CRITICAL,HIGH,MEDIUM"
+          scanners: "vuln,secret,misconfig"
+
+      - name: Upload Trivy results to GitHub Security tab
+        uses: github/codeql-action/upload-sarif@v4
+        if: always()
+        with:
+          sarif_file: "trivy-results.sarif"
+
+      - name: Run Trivy vulnerability scanner (table output)
+        uses: aquasecurity/trivy-action@0.35.0
+        if: always()
+        with:
+          scan-type: "fs"
+          scan-ref: "."
+          format: "table"
+          severity: "CRITICAL,HIGH"
+          scanners: "vuln,secret,misconfig"
+          exit-code: "1"