SPECS: Add dash

[woqidaideshi]

Summary

openRuyi currently does not provide a dash package, and /bin/sh is symlinked to /bin/bash. In contrast, Debian and Ubuntu have used dash as the default /bin/sh, because dash is a minimal, strictly POSIX-compliant shell designed for speed and low resource consumption.

Packaging dash does not change the default /bin/sh symlink. It simply makes dash available as an option via dnf install dash. Users who wish to benchmark or build with /bin/sh -> dash can explicitly reconfigure the symlink themselves.

Related Issue

• Resolves #

Checklist

• I have read the openRuyi Code of Conduct and agree to abide by it.

• I have read the AI-Assisted Contribution Policy, and this Pull Request includes non-trivial AI-assisted content.

Assisted-by:

[misaka00251]

Why do we need dash?

[woqidaideshi]

Why do we need dash?
@misaka00251

As described, linking /bin/sh to dash can improve scores in certain system performance benchmarks. The primary reason for providing dash is to facilitate performance testing and comparisons with other mainstream operating systems, which helps in identifying performance bottlenecks in openRuyi. Additionally, openRuyi does not install dash by default; it is simply provided as an optional choice for users who need it.