Show dialog when active contributors per month limit is hit

[ValentinBuira]

This PR add a new dialog when user try to sync while they have already hit the active contributor per month limit

Note for reviewer the error live and is triggered in synchronizationerror and synchronizationmanager

Resolve https://github.com/orgs/MerginMaps/projects/15/views/1?pane=issue&itemId=86203521

[github-actions]

Pull Request Test Coverage Report for Build 11930671912

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 59 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.03%) to 60.431%

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Files with Coverage Reduction	New Missed Lines	%
input/core/merginapi.cpp	3	78.95%
input/app/synchronizationerror.cpp	6	30.43%
input/app/mmstyle.h	50	1.94%

Totals
Change from base Build 11788282153:	0.03%
Covered Lines:	7882
Relevant Lines:	13043

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💛 - Coveralls

[VitorVieiraZ]

Looks good to me. I’ve left only comments about code styling and a suggestion for when apiSupportsSubscriptions is false.

[VitorVieiraZ]

Fix tests

[tomasMizera]

Just a tiny change, feel free to merge once adjusted 👍🏻 Thanks!

[tomasMizera]

We do not use this uploadSize anywhere. What would be nice though is to include the actual limit - similarly to what we did on plugin (see MerginMaps/qgis-plugin@f1ea460#diff-d5f841eda10b7504474461cbece2f5a718c04995de1956f64f1674138655c675R28)

Suggested change

	function onMonthlyContributorLimitReached( uploadSize ) {
	function onMonthlyContributorLimitReached( contributorsQuota ) {

[tomasMizera]

Fix tests

... aand yes, we will need to fix tests in case they will still be failing once the CI is re-run