feat: Add coverage section for gitlab CF-1740

[og-pixel]

Section is pretty much a copy from gihub,
edited section on github and gitlab mentioning
that this feature is only available on gihtub.
https://codacy.atlassian.net/jira/software/c/projects/CF/boards/160?selectedIssue=CF-1636&useStoredSettings=true

👀 Live preview

🚧 To do

• If relevant, include the Jira issue key at the end of the pull request title
• Perform a self-review of the changes
• Fix any issues reported by the CI/CD

[github-actions]

Overall readability score: 53.04 (🔴 -0.01)

File	Readability
gitlab-integration.md	53.24 (🔴 -2.12)
github-integration.md	49.72 (🔴 -0.21)

View detailed metrics

🟢 - Shows an increase in readability
🔴 - Shows a decrease in readability

File	Readability	FRE	GF	ARI	CLI	DCRS
gitlab-integration.md	53.24	35.78	10.69	13	13	7.41
	🔴 -2.12	🔴 -1.62	🔴 -0.49	🔴 -0.7	🔴 -0.13	🟢 +0.06
github-integration.md	49.72	35.07	11.72	13.8	13.29	7.43
	🔴 -0.21	🔴 -0.1	🔴 -0.03	🔴 -0.1	🟢 +0.05	🔴 -0.02

Averages:

	Readability	FRE	GF	ARI	CLI	DCRS
Average	53.04	42.87	10.95	12.7	12.63	7.99
	🔴 -0.01	🔴 -0.01	🟢 +0	🟢 +0	🟢 +0	🟢 +0

View metric targets

Metric	Range	Ideal score
Flesch Reading Ease	100 (very easy read) to 0 (extremely difficult read)	60
Gunning Fog	6 (very easy read) to 17 (extremely difficult read)	8 or less
Auto. Read. Index	6 (very easy read) to 14 (extremely difficult read)	8 or less
Coleman Liau Index	6 (very easy read) to 17 (extremely difficult read)	8 or less
Dale-Chall Readability	4.9 (very easy read) to 9.9 (extremely difficult read)	6.9 or less