Function execute 

pub fn execute(
    opts: &ParseOptions,
    writer: &mut dyn Write,
) -> Result<(), IdbError>

Parse an InnoDB tablespace file and display page headers with a type summary.

Opens the tablespace, auto-detects (or uses the overridden) page size, then iterates over every page reading the 38-byte FIL header to extract the checksum, page number, prev/next page pointers, LSN, page type, and space ID. Page 0 additionally displays the FSP header (space ID, tablespace size, free-page limit, and flags).

In single-page mode (-p N), only the specified page is printed with its full FIL header and trailer. In full-file mode (the default), all pages are listed and a frequency summary table is appended showing how many pages of each type exist. Pages with zero checksum and type Allocated are skipped by default unless --verbose is set; --no-empty additionally filters these from --json output.

With --verbose, each page also shows checksum validation status (algorithm, stored vs. calculated values) and LSN consistency between header and trailer.