Encoding alias csEUCKR not supported

[sebbASF]

Bug report

Bug description:

The encoding 'csEUCKR' has been spotted in emails, and has been supported by Java since at least version 8 [1]

It would be good if this could be added to the list of encoding aliases as an alias for euc_kr

[1] https://docs.oracle.com/javase/8/docs/technotes/guides/intl/encoding.doc.html

CPython versions tested on:

3.13

Operating systems tested on:

Linux

Linked PRs

• GH-131358: Add encoding alias cseuckr for euc_kr #131370

[StanFromIreland]

cpython/Lib/encodings/aliases.py

Lines 236 to 243 in e82c2ca

	# euc_kr codec
	'euckr' : 'euc_kr',
	'korean' : 'euc_kr',
	'ksc5601' : 'euc_kr',
	'ks_c_5601' : 'euc_kr',
	'ks_c_5601_1987' : 'euc_kr',
	'ksx1001' : 'euc_kr',
	'ks_x_1001' : 'euc_kr',

You can open a PR adding it.