Add string data to bowed string instruments, to allow for Tablatur notation

[Jojo-Schmitz]

Your idea

Add string data (number and tuning of strings, 'max. fret' reflecting the strings' range) to bowed string (violin, viola, cello, wetc.) instruments, to allow for Tablatur notration

Problem to be solved

Having string date on bowed string instruments (violin, viola, cello, etc.) would allow to create tablature staves for them.

Prior art

The string quartet template has string data embeded.
These may server as the source for these additions to instruments.xml

• Violin:

  MuseScore/share/templates/03-Chamber_Music/01-String_Quartet/01-String_Quartet.mscx

  Lines 56 to 62 in f982d40

  	<StringData>
  	<frets>24</frets>
  	<string>55</string>
  	<string>62</string>
  	<string>69</string>
  	<string>76</string>
  	</StringData>

• Viola:

  MuseScore/share/templates/03-Chamber_Music/01-String_Quartet/01-String_Quartet.mscx

  Lines 137 to 143 in f982d40

  	<StringData>
  	<frets>24</frets>
  	<string>55</string>
  	<string>62</string>
  	<string>69</string>
  	<string>76</string>
  	</StringData>

  )
• Cello:

  MuseScore/share/templates/03-Chamber_Music/01-String_Quartet/01-String_Quartet.mscx

  Lines 220 to 226 in f982d40

  	<StringData>
  	<frets>24</frets>
  	<string>48</string>
  	<string>55</string>
  	<string>62</string>
  	<string>69</string>
  	</StringData>

• Bass:

  MuseScore/share/templates/03-Chamber_Music/01-String_Quartet/01-String_Quartet.mscx

  Lines 302 to 308 in f982d40

  	<StringData>
  	<frets>24</frets>
  	<string>36</string>
  	<string>43</string>
  	<string>50</string>
  	<string>57</string>
  	</StringData>

  
  this one is also useful for plucked bass...

Additional context

This would need to be done in that (in)famous Excel sheet (outside the GitHub Repo), that the instruments.xml is generated from