fix warning re. unsued parameter
Fix even-odd page contiguous-ness.

In page view, the pages are shown in contiguous pairs, unconditionally starting with the second page, regardless of page numbering.

This fix makes each even page contiguous with the odd page following it, according to page numbering, i.e. taking into account `_pageNumberOffset`.
fix #26746: german chord mode compatibility with 1.3
add vtest
Merge pull request #1007 from mgavioli/even-odd-page-distance

Fix even-odd page contiguous-ness.
Merge pull request #1006 from Jojo-Schmitz/warnings

fix warning re. unused parameter
Merge pull request #1008 from MarcSabatella/26746-german-chords

fix #26746: German chord mode compatibilty with 1.3
Fix reading of measures with custom bar line sub-type.

If a measure has, in one staff, a bar line with a custom sub-type, the sub-type is applied to the bar lines of all the staves of this measure.

Fixed in `Measure::read()`.
Add relevant test.
export text formatting based on styles
Fix measure number text and key signature superposition
Merge pull request #1011 from lvinken/25193-musicxml-text-formatting-4

[MusicXML] export text formatting based on styles
Merge pull request #1012 from vgstef/ContinuousPanel

Fix measure number text and key signature superposition
Merge pull request #1010 from mgavioli/Fix_reading_measures_with_custom_barline_type

Fix reading of measures with custom bar line sub-type.
rename enum Dynamic::DynamicType to Dynamic::Type
move enum DynamicRange to Dynamic::Range

needed to make it available to the Plugin framework
change enum class SymId back to int

the memory saved is not worth the performance penalty
move enum Placement to Element::Placement

needed to make it available to the Plugin framework
move ElementType to Element::Type

needed to make it available to the Plugin framework
move SegmentType to Segment::Type and make int again

needed to make it available to the plugin framework
and the memory saved is not worth the performance penalty