add first Qt6 version of musredit, mupp, etc.

src/musredit_qt6/musredit/icons/edit-paste-plain.svg

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   version="1.1"
+   id="svg3815"
+   height="22"
+   width="22">
+  <defs
+     id="defs3817">
+    <style
+       id="current-color-scheme"
+       type="text/css">
+      .ColorScheme-Text {
+        color:#4d4d4d;
+      }
+      .ColorScheme-Background {
+        color:#eff0f1;
+      }
+      .ColorScheme-Highlight {
+        color:#3daee9;
+      }
+      .ColorScheme-ViewText {
+        color:#31363b;
+      }
+      .ColorScheme-ViewBackground {
+        color:#fcfcfc;
+      }
+      .ColorScheme-ViewHover {
+        color:#93cee9;
+      }
+      .ColorScheme-ViewFocus{
+        color:#3daee9;
+      }
+      .ColorScheme-ButtonText {
+        color:#31363b;
+      }
+      .ColorScheme-ButtonBackground {
+        color:#eff0f1;
+      }
+      .ColorScheme-ButtonHover {
+        color:#93cee9;
+      }
+      .ColorScheme-ButtonFocus{
+        color:#3daee9;
+      }
+      </style>
+  </defs>
+  <metadata
+     id="metadata3820">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     transform="translate(-461.71429,-525.79075)"
+     id="layer1">
+    <path
+       class="ColorScheme-Text"
+       id="rect3381"
+       transform="translate(461.71429,525.79075)"
+       d="M 7 3 L 7 5 L 5 5 L 4 5 L 4 19 L 5 19 L 18 19 L 18 18 L 18 5 L 17 5 L 15 5 L 15 3 L 7 3 z M 5 6 L 6 6 L 6 8 L 16 8 L 16 6 L 17 6 L 17 18 L 5 18 L 5 6 z M 7 9 L 7 10 L 15 10 L 15 9 L 7 9 z M 7 12 L 7 13 L 13 13 L 13 12 L 7 12 z M 7 15 L 7 16 L 10 16 L 10 15 L 7 15 z "
+       style="opacity:1;fill:currentColor;fill-opacity:1;stroke:none" />
+  </g>
+</svg>