[Feature]: Cut over to sist and remove Perl

[harryswift01]

Feature Request

Problem / Motivation

Once the sist package is proven equivalent to master.pl/IR_finder.pl, the test harness, Conda packaging, and documentation still reference the Perl scripts and need to switch over together.

Proposed Solution

• Update the Conda build, recipe, and test scripts to install and run sist instead of the Perl scripts and wrapper.
• Remove perl as a runtime dependency.
• Update the test fixtures to run the installed sist command instead of perl master.pl.
• Remove master.pl and IR_finder.pl.
• Update the documentation to describe the sist command instead of the Perl scripts.
• Update the release workflow so the package version is patched consistently across all version-tracked files.

Expected Impact

• Perl is fully removed from the codebase and its runtime dependency.
• No user-facing change to installed behaviour.