fix: handle empty chunked gzip responses correctly (#22360)

## Summary
Fixes #18413 - Empty chunked gzip responses were causing `Decompression
error: ShortRead`

## The Issue
When a server sends an empty response with `Content-Encoding: gzip` and
`Transfer-Encoding: chunked`, Bun was throwing a `ShortRead` error. This
occurred because the code was checking if `avail_in == 0` (no input
data) and immediately returning an error, without attempting to
decompress what could be a valid empty gzip stream.

## The Fix
Instead of checking `avail_in == 0` before calling `inflate()`, we now:
1. Always call `inflate()` even when `avail_in == 0` 
2. Check the return code from `inflate()`
3. If it returns `BufError` with `avail_in == 0`, then we truly need
more data and return `ShortRead`
4. If it returns `StreamEnd`, it was a valid empty gzip stream and we
finish successfully

This approach correctly distinguishes between "no data yet" and "valid
empty gzip stream".

## Why This Works
- A valid empty gzip stream still has headers and trailers (~20 bytes)
- The zlib `inflate()` function can handle empty streams correctly  
- `BufError` with `avail_in == 0` specifically means "need more input
data"

## Test Plan
✅ Added regression test in `test/regression/issue/18413.test.ts`
covering:
- Empty chunked gzip response
- Empty non-chunked gzip response  
- Empty chunked response without gzip

✅ Verified all existing gzip-related tests still pass
✅ Tested with the original failing case from the issue

🤖 Generated with [Claude Code](https://claude.ai/code)

---------

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
Co-authored-by: Ciro Spaciari <ciro.spaciari@gmail.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/cli/create_command.zig

@@ -327,8 +327,8 @@ pub const CreateCommand = struct {
 
                 var tarball_buf_list = std.ArrayListUnmanaged(u8){ .capacity = file_buf.len, .items = file_buf };
                 var gunzip = try Zlib.ZlibReaderArrayList.init(tarball_bytes.list.items, &tarball_buf_list, ctx.allocator);
-                try gunzip.readAll();
-                gunzip.deinit();
+                defer gunzip.deinit();
+                try gunzip.readAll(true);
 
                 node.name = try ProgressBuf.print("Extracting {s}", .{template});
                 node.setCompletedItems(0);