Coda ahead of a line of its own

Here the coda is simply engraved as a new score. (Contributed by Pierre Perol-Schneider.)

\version "2.24"

myMusic = {
  \clef F
  \key ees\major
  \time 5/4
  \set Score.currentBarNumber = #42
  \bar ""
  g8 r r g\p r4 bes8\< r c' r
  g8\mf r r g r4 bes,8 r c r
  d8-\tweak X-offset #-2.5 \f d4 d a,8 d^> r r4
  \bar "||"
  \mark\markup\musicglyph "scripts.segno"
  \key bes\major
}

myCoda = {
  \clef F
  \key bes\major
  \time 5/4
  \set Score.currentBarNumber = #45
  \bar ""
  d4. d8~ d4 ees8 r f8 r
  g4. g,8~g,4 g8 r8 r4
  \bar "||"
  \key ees\major
  c8 r r c r4 ees8 r f r
}

\score {
  \new Staff \with { 
    \omit TimeSignature 
  } 
  \myMusic
  \layout {
    indent = 0
    \context { 
      \Score 
      \omit TimeSignature
    } 
  }
}

\score {
  \new Staff \with {
    \omit TimeSignature
    instrumentName = \markup\vcenter { 
      \bold "coda" \fontsize #3 \musicglyph "scripts.coda" 
    }
  }
  \myCoda
  \layout {
    indent = 25
  }
}