Update loader for IDA Pro 9.4

[SaveEditors]

Summary

• Update the loader and build configuration for the final IDA Pro 9.4 SDK.
• Adopt the IDA 9.4 function APIs while retaining IDA SDK 9.3 compatibility.
• Improve XEX and XBE handling, including early XEX variants and XEX% identification.
• Add Windows build-environment validation, exact SDK provenance checks, and automated loader regression testing.
• Add installation and usage documentation.
• Enable strict warning checks for first-party code while keeping vendored dependency warnings separate.

This update targets IDA Pro 9.4 on Windows. macOS was not included in compatibility testing.

Verification

• Builds: final IDA SDK v9.4.0-release, Release x64; strict /W4; IDA SDK 9.3 compatibility build
• Format coverage: XEX0, XEX1, XEX2, XEX-, XEX?, XEX%, and XBE
• Structural validation: 44 SHA-256-unique XEX-family inputs; file type, PowerPC processor, segments, loaded data, entry points, functions, imports, names, and database generation
• Focused regression: 16/16 loader cases
• Additional XEX2 coverage: 9/9 content-unique cases
• Command-line parser: 15/15 focused XEX inputs plus 2/2 XEX% inputs
• Installation: isolated IDA Pro 9.4 loader installation and database generation
• Code quality: zero first-party warnings in the clean strict build

Closes #13.

Release was published here for testing: https://github.com/SaveEditors/idaxex/releases/tag/ida-pro-9.4-saveeditors-1

[emoose]

Looks like 1434 has some xex using XEX?, did those have issues with loader?

[SaveEditors]

Whoops, that was a leftover from my testing — only had 1529 XEXs on hand and mislabeled it. 1434 loads fine, just the version string was wrong. Reverted to >=1434.