Neat corrections, regression fixes and additions

[NexiusTailer]

1. The main change is that it now tries to fix all the regressions from SA-MP wiki found from the moment it was firstly ported in open.mp docs. Some pages didn't include important facts about return values, some others dropped notes and warnings still relevant even for omp server natives and callbacks, some different code examples were mistakenly merged into one code block, some pages didn't have all necessary links to related functions as SA-MP wiki had
2. The same was applied to all the translations which exist both on SA-MP wiki and open.mp docs: let's say if we have FR translated page in both places and this EN article was changed with some data restored from SA-MP wiki article, FR translated page was also checked against SA-MP wiki FR page and the same stuff were ported from there as well. Such moves were done purely because I didn't want to invent any translations by myself (of the languages I don't speak)
3. Fixed some ES pages where the return values were reversed for some functions; corrected a note in FR OnPlayerDeath page that stated the opposite to the EN page ("killerid doesn't need checking before SendDeathMessage"); removed a duplicated warning text from CN translation of SetVehicleParamsForPlayer, translated some English leftovers in RU pages
4. Format corrections: fixed broken italics in some FR pages, fixed uncovered ~r~ and other codes which wrongly become strikethrough across all translations, removed zero-width spaces (prob by machine translation) in some CN pages which ruined rendering text in bold
5. Removed artconfig.txt examples from AddCharModel and AddSimpleModel since this way was deprecated in open.mp
6. Fixed code examples in OnDialogResponse across all translations, which wrongly passed DIALOG_STYLE_TABLIST instead of DIALOG_STYLE_TABLIST_HEADERS for a dialog which clearly had headers in its body text