Fix #456: [FR] Handle ar-mot and ar-terme

[lasconic]

• Fixes [FR] Handle ar-mot and ar-terme #456
• Tests added/updated.
• ./check.sh run and eventual issues fixed.
• Updated CONTRIBUTORS.md, if not already done in the past.

[lasconic]

FYI I didn't test this on kobo at all... I have no idea how arabic is rendered on kobo, even with a Unicode font.

[sourcery-ai]

Sourcery Code Quality Report

❌  Merging this PR will decrease code quality in the affected files by 1.80%.

Quality metrics	Before	After	Change
Complexity	13.50 🙂	14.50 🙂	1.00 👎
Method Length	379.33 ⛔	387.67 ⛔	8.34 👎
Working memory	143.52 ⛔	137.82 ⛔	-5.70 👍
Quality	34.35% 😞	32.55% 😞	-1.80% 👎

Other metrics	Before	After	Change
Lines	755	762	7

Changed files	Quality Before	Quality After	Quality Change
scripts/lang/fr/init.py	34.35% 😞	32.55% 😞	-1.80% 👎

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	22 😞	210 ⛔	18 ⛔	27.55% 😞	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions

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[BoboTiG]

I will be able to test and take a screenshot.

[BoboTiG]

Sorry for the delay, I will test it tomorrow for sure :)