Add Sliver BOF end-to-end coverage for Winver

.github/sliver-bof-e2e.yml

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+schema: sliver-bof-e2e/v1
+
+sliver:
+  version: 422044af0dbfd75e4588756f9c7a4e3536eba376
+
+defaults:
+  bof_executor: reflektor
+  entrypoint: go
+  modes: [session, beacon]
+  command_timeout: 2m
+
+suites:
+  - name: windows-amd64
+    target:
+      os: windows
+      arch: amd64
+    tests:
+      - name: winver
+        object: BOF/Winver/Winver.x64.o
+        expect:
+          output:
+            contains: ['OS build number:']
+
+  - name: windows-386
+    target:
+      os: windows
+      arch: '386'
+    tests:
+      - name: winver
+        object: BOF/Winver/Winver.x86.o
+        expect:
+          output:
+            contains: ['OS build number:']

.github/workflows/sliver-bof-e2e.yml

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+name: Sliver BOF end-to-end
+
+"on":
+  pull_request:
+  push:
+    branches: [main]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+jobs:
+  bof-e2e:
+    uses: sliverarmory/sliver-test-bof/.github/workflows/e2e.yml@b38a09a226bf861a1e56e9dbe07838fe99138582
+    with:
+      manifest: .github/sliver-bof-e2e.yml
+      prepare-command: bash ./scripts/prepare-sliver-bof-e2e.sh

scripts/prepare-sliver-bof-e2e.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+if ! command -v x86_64-w64-mingw32-gcc >/dev/null ||
+   ! command -v i686-w64-mingw32-gcc >/dev/null ||
+   ! command -v x86_64-w64-mingw32-strip >/dev/null ||
+   ! command -v i686-w64-mingw32-strip >/dev/null; then
+  sudo apt-get update -qq
+  sudo apt-get install -y --no-install-recommends \
+    gcc-mingw-w64-x86-64 gcc-mingw-w64-i686 \
+    binutils-mingw-w64-x86-64 binutils-mingw-w64-i686
+fi
+
+make -C BOF/Winver/SOURCE
+test -s BOF/Winver/Winver.x64.o
+test -s BOF/Winver/Winver.x86.o