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

backend/tests/data/svg/dpd_compliant.svg

@@ -5,7 +5,7 @@
  <g id="barcode" fill="#000000">
   <rect x="0" y="0" width="472" height="165" fill="#FFFFFF"/>
   <path d="M25 6h4v133.33h-4ZM31 6h2v133.33h-2ZM37 6h2v133.33h-2ZM47 6h2v133.33h-2ZM55 6h2v133.33h-2ZM61 6h4v133.33h-4ZM69 6h2v133.33h-2ZM75 6h6v133.33h-6ZM83 6h4v133.33h-4ZM91 6h2v133.33h-2ZM95 6h6v133.33h-6ZM103 6h8v133.33h-8ZM113 6h2v133.33h-2ZM121 6h4v133.33h-4ZM129 6h2v133.33h-2ZM135 6h4v133.33h-4ZM143 6h6v133.33h-6ZM153 6h2v133.33h-2ZM157 6h6v133.33h-6ZM165 6h4v133.33h-4ZM173 6h2v133.33h-2ZM179 6h4v133.33h-4ZM187 6h2v133.33h-2ZM193 6h2v133.33h-2ZM201 6h8v133.33h-8ZM211 6h2v133.33h-2ZM219 6h2v133.33h-2ZM223 6h4v133.33h-4ZM229 6h4v133.33h-4ZM237 6h4v133.33h-4ZM245 6h4v133.33h-4ZM251 6h4v133.33h-4ZM259 6h4v133.33h-4ZM267 6h4v133.33h-4ZM275 6h4v133.33h-4ZM283 6h4v133.33h-4ZM289 6h4v133.33h-4ZM295 6h4v133.33h-4ZM303 6h4v133.33h-4ZM311 6h6v133.33h-6ZM321 6h4v133.33h-4ZM327 6h2v133.33h-2ZM333 6h4v133.33h-4ZM341 6h2v133.33h-2ZM349 6h2v133.33h-2ZM355 6h2v133.33h-2ZM359 6h4v133.33h-4ZM367 6h6v133.33h-6ZM377 6h4v133.33h-4ZM385 6h2v133.33h-2ZM389 6h2v133.33h-2ZM399 6h2v133.33h-2ZM403 6h2v133.33h-2ZM407 6h8v133.33h-8ZM421 6h4v133.33h-4ZM431 6h6v133.33h-6ZM439 6h2v133.33h-2ZM443 6h4v133.33h-4ZM25 0h422v6h-422Z"/>
-  <text x="236" y="153.33" text-anchor="middle" font-family="Helvetica, sans-serif" font-size="14">
+  <text x="236" y="153.33" text-anchor="middle" font-family="Arimo, Arial, sans-serif" font-size="14">
    0081 827 0998 0000 0200 28 101 276 B
   </text>
  </g>