Actually change SVG font to "Arimo, Arial, sans-serif" ([607e4ed])

Allow `--embedfont` for non-EAN/UPC SVG also (& update GUI)
SVG: add "fonts/normal_woff2.h"; use array syntax for it &
  "fonts/upcean_woff2.h" to avoid large strings
GUI: embed Arimo (via "fonts/normal_ttf.h"), same as OCRB
Change textgap max 5X -> 10X
README: make list of barcodes 2-col table for readability
win32/README: note Visual Studio 2022 re CMake

docs/images/bc412.svg

@@ -5,7 +5,7 @@
  <g id="barcode" fill="#000000">
   <rect x="0" y="0" width="490" height="126" fill="#FFFFFF"/>
   <path d="M0 0h4.8v80h-4.8ZM14.4 0h4.8v80h-4.8ZM24 0h4.8v80h-4.8ZM43.2 0h4.8v80h-4.8ZM57.6 0h4.8v80h-4.8ZM72 0h4.8v80h-4.8ZM91.2 0h4.8v80h-4.8ZM100.8 0h4.8v80h-4.8ZM110.4 0h4.8v80h-4.8ZM129.6 0h4.8v80h-4.8ZM148.8 0h4.8v80h-4.8ZM158.4 0h4.8v80h-4.8ZM168 0h4.8v80h-4.8ZM187.2 0h4.8v80h-4.8ZM196.8 0h4.8v80h-4.8ZM206.4 0h4.8v80h-4.8ZM235.2 0h4.8v80h-4.8ZM244.8 0h4.8v80h-4.8ZM254.4 0h4.8v80h-4.8ZM268.8 0h4.8v80h-4.8ZM278.4 0h4.8v80h-4.8ZM302.4 0h4.8v80h-4.8ZM312 0h4.8v80h-4.8ZM326.4 0h4.8v80h-4.8ZM340.8 0h4.8v80h-4.8ZM360 0h4.8v80h-4.8ZM369.6 0h4.8v80h-4.8ZM384 0h4.8v80h-4.8ZM403.2 0h4.8v80h-4.8ZM417.6 0h4.8v80h-4.8ZM427.2 0h4.8v80h-4.8ZM436.8 0h4.8v80h-4.8ZM446.4 0h4.8v80h-4.8ZM475.2 0h4.8v80h-4.8ZM484.8 0h4.8v80h-4.8Z"/>
-  <text x="244.8" y="113.6" text-anchor="middle" font-family="Helvetica, sans-serif" font-size="33.6">
+  <text x="244.8" y="113.6" text-anchor="middle" font-family="Arimo, Arial, sans-serif" font-size="33.6">
    AQQ45670
   </text>
  </g>