Minor follow-up initrd feedback items

[benhillis]

Some minor feedback items that came up during the initrd change that I wanted to wait until after merging.

[benhillis]

unrelated but I keep getting annoyed that the test-storage directory isn't in the gitignore in the main branch.

[Copilot]

Pull request overview

Follow-up adjustments around initrd/initramfs (CPIO “newc”) generation and installation behavior, plus a small cleanup to repo ignore patterns.

Changes:

• Update the CPIO initrd writer to treat only the "TRAILER!!!" entry as the special zeroed header, and to compute archive padding using the full file size (QuadPart).
• Adjust the Windows SimpleTests CPIO validation to read exactly the 110-byte newc header while keeping a null-terminated buffer for parsing.
• Update MSI installer sequencing comment for initrd generation and tweak .gitignore entries.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 2 comments.

File	Description
test/windows/SimpleTests.cpp	Reads/parses the fixed-size 110-byte CPIO newc header with explicit null termination.
src/windows/common/filesystem.cpp	Fixes CPIO header field selection for trailer vs. empty files; fixes padding calculation to use 64-bit current position.
msipackage/package.wix.in	Clarifies when CreateInitrd runs by updating the inline comment.
.gitignore	Adjusts ignored patterns (removes *.targets and build/, adds a few specific ignores).

[Copilot]

The header size is hard-coded as 110 in both the ReadFile length and the VERIFY_ARE_EQUAL check. Since the buffer size was just changed to 111 to include a null terminator, consider using a single named constant (or sizeof(header) - 1) to keep the read length/check consistent and avoid future off-by-one drift.

Suggested change

	THROW_IF_WIN32_BOOL_FALSE(ReadFile(cpioHandle.get(), header, 110, &bytesRead, nullptr));
	VERIFY_ARE_EQUAL(bytesRead, 110u);
	const DWORD headerBytesToRead = static_cast<DWORD>(sizeof(header) - 1);
	THROW_IF_WIN32_BOOL_FALSE(ReadFile(cpioHandle.get(), header, headerBytesToRead, &bytesRead, nullptr));
	VERIFY_ARE_EQUAL(bytesRead, headerBytesToRead);

[Copilot]

This changes the CPIO header fields so that empty files (fileSize==0) still get a regular-file mode/nlink, and only the trailer gets zeros. The existing CreateCpioInitrd test parses filesize/namesize but doesn’t assert mode/nlink, so it wouldn’t catch regressions in this logic. Consider extending the test to parse and validate mode/nlink at least for sourceSize=0 (and ideally also validate the trailer entry).