Add icons and highlight.js to project

This commit includes the addition of a new toolbox icon in both .ico and .png formats, updating the resource file to reference the new icon. In addition, numerous highlight.js files and styles have been integrated into the project, enhancing syntax highlighting capabilities. Existing file references in 'out_embed/all.hpp' have been updated accordingly.Add new highlighting styles and GitHub CSS to project

Introduced two new image styles, "brown-papersq" and "pojoaque", for highlighting. Additionally, embedded GitHub's CSS files as header files in the `saucer::embedded` namespace to enhance syntax highlighting features. These changes aim to improve the visual styling and customization options for code presentation.

res/highlight/DIGESTS.md

@@ -0,0 +1,57 @@
+## Subresource Integrity
+
+If you are loading Highlight.js via CDN you may wish to use [Subresource Integrity](https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity) to guarantee that you are using a legimitate build of the library.
+
+To do this you simply need to add the `integrity` attribute for each JavaScript file you download via CDN. These digests are used by the browser to confirm the files downloaded have not been modified.
+
+```html
+<script
+  src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.10.0/highlight.min.js"
+  integrity="sha384-pGqTJHE/m20W4oDrfxTVzOutpMhjK3uP/0lReY0Jq/KInpuJSXUnk4WAYbciCLqT"></script>
+<!-- including any other grammars you might need to load -->
+<script
+  src="//cdnjs.cloudflare.com/ajax/libs/highlight.js/11.10.0/languages/go.min.js"
+  integrity="sha384-Mtb4EH3R9NMDME1sPQALOYR8KGqwrXAtmc6XGxDd0XaXB23irPKsuET0JjZt5utI"></script>
+```
+
+The full list of digests for every file can be found below.
+
+### Digests
+
+```
+sha384-RUztCzxEjYyjTIr1xn04xHYn094/NrWUPagE08eCjI3ha3VPLU6wkyQpsmXEWyqX /es/languages/asciidoc.js
+sha384-9XM0lQmJ4T2vT5fovmdMwihL4baMIxlzYPj6DUTgkGIQPNur/r5HVQmz7NufVMHp /es/languages/asciidoc.min.js
+sha384-yIW2CKaxiozMCGVe7a2RX90kdUjP0h2gALuNlfKbojKpQn1OmMQLGO7BOqhncFO6 /es/languages/http.js
+sha384-j+2AgmE+4SlZjmviwPvbGypcb9BQNHQj043l9Bb3F2fnlusdNxxA5/INHsOrSE6g /es/languages/http.min.js
+sha384-R87hRh4kF8+iz2sB6FvLrfR0XZBohjFXeJKIXld1Eji2UVi+M2+OIgJKma/9Ko6u /es/languages/json.js
+sha384-QFDPNpqtrgZCuAr70TZJFM4VCY+xNnyGKwJw2EsWIBJOVcWAns9PHcLzecyDVv+x /es/languages/json.min.js
+sha384-OJrXTVCemUa68axskWVxZHXuDfyPWWFK0X2cJsPaMBt6jGY1HxnBZJVPEHTqou4H /es/languages/lua.js
+sha384-cjlU8DPjZ3XY/dLzIx+CaoB2jzKXf43s2KSU2rZQGmxwR1d7k9p+SFt1IsNkFnnV /es/languages/lua.min.js
+sha384-JkFMmKMbHcXjdfHauRnREGG6i73GyMisdqNivBm4Z9m2Oc82YIu5jQtIjLa508e8 /es/languages/markdown.js
+sha384-65/lNNIY+ayhHTtFznjnyZ5w2NDdZIpSEcqjss/p4ex5JamZ46FdYwDDf6IBLCmE /es/languages/markdown.min.js
+sha384-VYwyP5ddOUunx1AGpbtE38OKY2PbjW9kk6X6622tvqprRJk6W8/tgMvI7MqaOZZw /es/languages/shell.js
+sha384-gRgqaIgHrAR1qlo866rkV1AUahqopv0dnpFFLAC4X3jYTDagRCTxQBTMFGV1+x1U /es/languages/shell.min.js
+sha384-ZX3mm6sjLYWMBTMUJYzvQXYHNWVJkD+t1ppx4BysyVs6cVhvYFVuwMlVCeAwtwm9 /es/languages/sql.js
+sha384-DloKeCkj/pTPHeqWu3keGoEPpZJGm44yQjSmSfpWasykAMUobM0hcYFFPsg1PE6K /es/languages/sql.min.js
+sha384-Tdx2DY9ZTHx3KhVXYqOVKx3q1zOboDGlTTv8sgMlER8y4WETtqL+C4VQ7B4A0OGq /es/languages/xml.js
+sha384-n9ZezaAVj8pK1BIFZQxmC1BM9yGuBNRgvsOxHMHPCXzqYd1gSYIu9KjgGEm8K57w /es/languages/xml.min.js
+sha384-XQWxU5ed7p1JZtCL9asG4KebId1+C4otC8gt2SOjnhgWGZNUlFu30TAYkALGIjLK /languages/asciidoc.js
+sha384-q+4aQVHnY1FwKezXFV3xmaRkdKNu1ux80j8yzOSaAjn9EeziuDYQhRFPdqeNXsds /languages/asciidoc.min.js
+sha384-5njNAV6cayF+v1sc70/t3BTkztvcp8TZ61d65U8YUQuXJ45PIrhcgNfccRMd9JsI /languages/http.js
+sha384-ubRntct0s40ZDtDRLkxA3/xYX51o5yC2U8SKlky8dhIRsjSnvZiUKLhz0gNTewno /languages/http.min.js
+sha384-psmmPlbfEWGyvRapexDqkVTgNz7Y1xvlGdLNWQSafI4GFQYFDXPZxVXH1laU4n6l /languages/json.js
+sha384-Bb6DhE3tUpBROwypL78TbhRUs9QbCt2GxcxVSYglt2l3MefrYkm4CfwjfWhRfQaX /languages/json.min.js
+sha384-N16TmpAW2Qx3T6s3/C0f0jweUUSh69YsJ1+AnOsAePpjmmydXF/mjeY0MZEF/cPn /languages/lua.js
+sha384-WES4Ky9nlehN2gBM6oY3/98hVtWF5PZnBO+7jK8ZVKFo+QR32zhfuRK+Mv9jQsOK /languages/lua.min.js
+sha384-TVvUXbmPgdS59xZSFUeyNQ1vUkeCbBpuMj3qlzdEwdQhoO5F/WNdI94UEw8g7Enp /languages/markdown.js
+sha384-sFh+6oaRBb6kdaMLf8x7qeH7NTvm2u1Ta6PtI0S8hoA+bP7UtHCyKFzaI1JBXwhT /languages/markdown.min.js
+sha384-KYOeDvyFo8fJObDV1L1aoPnfs6XG68LL6j3INM7McXyRYtBZF7DdUsNjK25dtxKo /languages/shell.js
+sha384-olAuUjfRvTi/iEH4RXRpaq/G1iJGizn7OefkyJLQYuqNhh1xAV5dnUrkH/LlPd9j /languages/shell.min.js
+sha384-w/OmtgUvmlKWaVatpcvuEQxP7bkJzI5gLeeQkuXjApJNiQvNmXFL2PBM5RWgKqDr /languages/sql.js
+sha384-2uzCjI3OPwJce6i2hphsYs1qqTqRrDnfPXbfjZggPWy2/Lgl8gzV9Hyl0jhhoWy4 /languages/sql.min.js
+sha384-QAL2h4IMgQaJUJjUy0dSWdAut7o/A272ai8qOsJ8SSm9KMxkdLgH7oGfLGft/EJ0 /languages/xml.js
+sha384-CN3No+n1UZXCFYyl+ge5yAPGTNGuH23BdIsFJxntDmEYL94AmoZlNBHGSdjVSjKG /languages/xml.min.js
+sha384-IJrrc8vSRkMxiTpuGGQCj3xTN+mGzfUO9i4fsMcmKrAxRIlnaezDKGb/6CWsBZM0 /highlight.js
+sha384-NZebenV0AmWtcyjiiSt9piDnbIyew6nqAt7xKY7YeT+7Eh2unuaiJ1I+oX/bKCH3 /highlight.min.js
+```
+