modern7z: Enhance manifest description, licensing metadata, and installation logic

[SorYoshino]

Summary

Refines the modern7z manifest to improve metadata quality and significantly harden codec-installation logic by resolving the actual 7z.exe location and managing the Codecs directory directly.

Related issues or pull requests

• Relates to 7zip: Refine manifest metadata, context-menu handling, and (un)installer scripts #7476
• Relates to asar7z: Update description & license, improve install/uninstall script logic Extras#16918

Changes

• Rewrite description for precision and technical completeness
• Add structured license field with identifier and terms-of-use URL
• Rework architecture handling:
  • unify content layout by copying architecture-specific payload to root
  • remove residual 32/64 directories after deployment
• Reimplement installer.script to:
  • resolve 7z.exe path dynamically
  • ensure existence of the Codecs directory
  • copy codec binaries safely while excluding manifest files
• Reimplement uninstaller.script to:
  • locate the active 7z.exe
  • remove only plugin files installed by this manifest
• Remove deprecated junction-based logic and reliance on persistdir

Notes

• Using the persistdir function is only applicable when 7-Zip is installed via Scoop and cannot accommodate scenarios where users enable use_external_7zip. Moreover, the installation location depends on the installation path of 7-Zip, meaning that the value of $global must be consistent at installation time.
• In addition, when using scoop which 7z, if 7z cannot be found through the Path environment variable, it will unavoidably output: '7z' not found, not a scoop shim, or a broken shim.
• Neither of these approaches is optimal. This pull request resolves the above issues by using Get-CommandPath -Command '7z.exe'.

https://github.com/ScoopInstaller/Extras/blob/058e9652b53bb7d361620ed10cf0a26ed64c0ec7/bucket/asar7z.json#L8-L13

Testing

The test results are as follows:

┏[ ~]
└─> 7z i

7-Zip 25.01 (x64) : Copyright (c) 1999-2025 Igor Pavlov : 2025-08-03

Libs:
 0 : 25.01 : D:\Software\Scoop\Local\apps\7zip\current\7z.dll

┏[ ~]
└─> scoop install Unofficial/modern7z
Installing 'modern7z' (1.9.2) [64bit] from 'Unofficial' bucket
Loading Modern7z.zip from cache.
Checking hash of Modern7z.zip ... ok.
Extracting Modern7z.zip ... done.
Running pre_install script...done.
Running installer script...done.
Linking D:\Software\Scoop\Local\apps\modern7z\current => D:\Software\Scoop\Local\apps\modern7z\1.9.2
'modern7z' (1.9.2) was installed successfully!

┏[ 01/03/2026 @ 8:14:37 PM CST][ Zertw ::  ASUS][ RAM: 10/15GB][ 95][ 0.613s]
┣[ ~]
└─> 7z i

7-Zip 25.01 (x64) : Copyright (c) 1999-2025 Igor Pavlov : 2025-08-03

Libs:
 0 : 25.01 : D:\Software\Scoop\Local\apps\7zip\current\7z.dll
 1 : 0.00 : D:\Software\Scoop\Local\apps\7zip\current\Codecs\Modern7z.64.dll

┏[ ~]
└─> scoop uninstall modern7z
Uninstalling 'modern7z' (1.9.2).
Running uninstaller script...done.
Unlinking D:\Software\Scoop\Local\apps\modern7z\current
'modern7z' was uninstalled.

┏[ ~]
└─> 7z i

7-Zip 25.01 (x64) : Copyright (c) 1999-2025 Igor Pavlov : 2025-08-03

Libs:
 0 : 25.01 : D:\Software\Scoop\Local\apps\7zip\current\7z.dll

• Use conventional PR title: <manifest-name[@version]|chore>: <general summary of the pull request>
• I have read the Contributing Guide

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[SorYoshino]

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