Common - Improve file checking error messages

[LinkIsGrim]

When merged this pull request will:

• Let me call people stupid when they don't read.

Example formatting:

Cases for errors are:

Client has additional ace addons, and compats are in additional addons // CDLC/RHS/etc loaded on client but not on server
Client has additional ace addons, and compats are not in additional addons (e.g. server has no medical loaded) // ace from different places

Version mismatch between server and client // what it says on the tin

Client has outdated addons across multiple ACE sources // conflicting install
Client has outdated addons across a single ACE source // corrupted install or bad repack

IMPORTANT

• If the contribution affects the documentation, please include your changes in this pull request so the documentation will appear on the website.
• Development Guidelines are read, understood and applied.
• Title of this PR uses our standard template Component - Add|Fix|Improve|Change|Make|Remove {changes}.

[TheCandianVendingMachine]

imo the fix should come first. users won't read the full error message, and we can maybe filter out more bogus issues if the order is changed

[LinkIsGrim]

Had to unbreak git, no changes made in force push

[PabstMirror]

just a possibility

Suggested change

	private _errorBuilder = switch (true) do {
	case _versionMismatch: {_fnc_diagnose_versionMismatch};
	case _addonMismatch: {_fnc_diagnose_addonMismatch};
	};
	(call _errorBuilder) params ["_title", "_reasonMsg", "_fixMsg", "_infoMsg", "_infoMsgLog"];
	(switch (true) do {
	case _versionMismatch: _fnc_diagnose_versionMismatch;
	case _addonMismatch: _fnc_diagnose_addonMismatch;
	}) params ["_title", "_reasonMsg", "_fixMsg", "_infoMsg", "_infoMsgLog"];

[LinkIsGrim]

I'm not the biggest fan of it

[LinkIsGrim]

I've asked two unrelated test subjects who don't even play Arma to take a look and they said it seems good and could probably fix it themselves (at least better than the old ones).

[johnb432]

From a logic point of view, LGTM