[UX] address user feedback: per-year template text and column header, more visible "Add resource" button, fixed next-tab navigation on all pages, updated method constraints intro text

[FIX] data: exclude "other" resources from resource template, drop inputs_template generation

[FEAT] Goal 1 almost achieved: two types of limits possible(percentage / absolute value), start of unit conversion, adapted export templates and a bug fix in the ‘Coefficients’ tab (some resources not displayed)