fix #323: [FR] Handle 'cit_réf' / 'cit réf' template

[lasconic]

• Fixes [FR] Handle "cit_réf" / "cit réf" template #323
• Tests added/updated.
• ./check.sh run and eventual issues fixed.
• Updated CONTRIBUTORS.md, if not already done in the past.

[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 0.38%.

Quality metrics	Before	After	Change
Complexity	175.91 ⛔	193.40 ⛔	17.49 👎
Method Length	733.00 ⛔	789.00 ⛔	56.00 👎
Working memory	55.60 ⛔	52.58 ⛔	-3.02 👍
Quality	4.64% ⛔	4.26% ⛔	-0.38% 👎

Other metrics	Before	After	Change
Lines	1124	1168	44

Changed files	Quality Before	Quality After	Quality Change
scripts/lang/fr/init.py	4.64% ⛔	4.26% ⛔	-0.38% 👎

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
scripts/lang/fr/init.py	last_template_handler	209 ⛔	1488 ⛔	28 ⛔	1.20% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions

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