Function parse_srcinfo 

pub fn parse_srcinfo(content: &str) -> SrcinfoData

What: Parse full .SRCINFO content into structured data.

Inputs:

• content: Raw .SRCINFO file content.

Output:

• Returns SrcinfoData with all parsed fields populated.

Details:

• Parses all fields from .SRCINFO format including pkgbase, pkgname, pkgver, pkgrel.
• Extracts all dependency types (depends, makedepends, checkdepends, optdepends).
• Extracts conflicts, provides, and replaces arrays.
• For split packages (multiple pkgname), uses the first pkgname found.
• Handles architecture-specific dependencies by merging into main arrays.
• Returns default SrcinfoData with empty fields if content is malformed.