BundleHeaderOrBuilder

## Header: Compression mode.

The compression mode is an 16-bit unsigned integer which identifies the compression mode used to compress the file
tree metadata and filesystem data.

## Header: Compression mode.

The compression mode is an 16-bit unsigned integer which identifies the compression mode used to compress the file
tree metadata and filesystem data.

## Header: CRC32.

The CRC32 is a 32-bit unsigned integer which is used to verify the integrity of the decompressed tree metadata.
After (or during) decompression, a CRC32 checksum is calculated over the decompressed data, and compared against
this reference value to ensure data integrity remains intact.

## Header: Format version.

The format version is an 16-bit unsigned integer which identifies the version of the bundle file format. The format
version is always `1` at this time.

## Header: Magic number.

The magic number is a constant value known by the Elide framework, which is used to identify the file as an Elide
VFS bundle. The magic number is a 32-bit unsigned integer, and is always the numeric equivalent of the ASCII string
`ELDE`, or, `0x454C4445`.