_chroma/-perl.ch: Support -E flag

[mrnoname1000]

Description

Perl supports providing a command with -e or -E. The latter enables all optional features and it's nice for concise one-liners, but F-Sy-H doesn't recognize it. This PR adds a check for the -E flag and highlights it the same way as -e

Motivation and Context

It adds syntax highlighting for perl -E 'script' style invocation.

Usage examples

-E enables the isa operator. This would result in a syntax error with -e.

perl -E '$a isa $b'

How Has This Been Tested?

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• Bug fix (non-breaking change which fixes an issue)
• Documentation change
• New feature (non-breaking change which adds functionality)

Checklist:

• All new and existing tests passed.
• I have added tests to cover my changes.
• I have updated the documentation accordingly.

It looks like no existing tests cover this scenario but I ran them anyway. I updated the comment at the top to reflect the changes.