Description

Don't assume bat is installed for use in previews.
If it is installed, don't assume is installed as bat - it might be installed as batcat.

Checklist

[x] All new and existing tests pass.
[ ] Rather than adding functions to fzf-zsh-plugin.zsh, I have created standalone scripts in bin so they can be used by non-ZSH users too.
[ ] Any scripts added use #!/usr/bin/env interpreter instead of potentially platform-specific direct paths (#!/bin/sh is an ok exception)
[ ] Scripts are marked executable
[ ] Scripts do not have a language file extension unless they are meant to be sourced and not run standalone. No one should have to know if a script was written in bash, python, ruby or whatever. Not including file extensions makes it easier to rewrite the script in another language later without having to change every reference to the previous version.
[ ] I have confirmed that the link(s) in my PR are valid.
[x] I have read the CONTRIBUTING document.

[x] This repository is Apache version 2.0 licensed (some scripts may have alternate licensing inline in their code) and by making this PR, I am contributing my changes to the repository under the terms of the Apache 2 license.

Descriptor	Linter	Files	Errors	Elapsed time
✅ COPYPASTE	jscpd	yes	no	1.01s
⚠️ REPOSITORY	checkov	yes	2	10.24s
✅ REPOSITORY	devskim	yes	no	1.51s
✅ REPOSITORY	dustilock	yes	no	0.0s
✅ REPOSITORY	gitleaks	yes	no	0.15s
✅ REPOSITORY	git_diff	yes	no	0.01s
✅ REPOSITORY	grype	yes	no	11.28s
⚠️ REPOSITORY	kics	yes	1	1.43s
✅ REPOSITORY	secretlint	yes	no	1.0s
✅ REPOSITORY	syft	yes	no	0.21s
✅ REPOSITORY	trivy	yes	no	4.25s
✅ REPOSITORY	trivy-sbom	yes	no	2.96s
✅ REPOSITORY	trufflehog	yes	no	8.17s

See detailed report in MegaLinter reports _Set VALIDATE_ALL_CODEBASE: true in mega-linter.yml to validate all sources, not only the diff_

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