Add documentation to published resizeIframe

[rossjrw]

https://interwiki.scpwiki.com/resizeIframe.js is currently:

var resizeIframe=(function(){var u=Object.defineProperty;var m=Object.getOwnPropertyDescriptor;var f=Object.getOwnPropertyNames;var p=Object.prototype.hasOwnProperty;var d=function(n,e){for(var t in e)u(n,t,{get:e[t],enumerable:!0})},v=function(n,e,t,r){if(e&&typeof e=="object"||typeof e=="function")for(var i=f(e),c=0,o=i.length,a;c<o;c++)a=i[c],!p.call(n,a)&&a!==t&&u(n,a,{get:function(s){return e[s]}.bind(null,a),enumerable:!(r=m(e,a))||r.enumerable});return n};var z=function(n){return v(u({},"__esModule",{value:!0}),n)};var x={};d(x,{createResizeIframe:function(){return y},debounce:function(){return l}});function y(n,e,t){t==null&&(t=750);var r=document.getElementById("resizer-container");r==null&&(r=document.createElement("div"),r.id="resizer-container",document.body.appendChild(r));var i=document.createElement("iframe");i.style.display="none",r.appendChild(i),e=e.replace(/^\/+/,"");var c=function(o){o==null&&(o=r.getBoundingClientRect().top,o&&(o+=1));var a=n+"/common--javascript/resize-iframe.html?#"+o+"/"+e;i.src!==a&&(i.src="about:blank",setTimeout(function(){i.src=a},50))};return l(c,t)}function l(n,e){var t=0;return function(){var r=this,i=arguments;clearTimeout(t),t=setTimeout(function(){n.apply(r,i)},e)}}return z(x);})();
//# sourceMappingURL=resizeIframe.js.map

considering that this is the URL casual users in the wild will encounter, and be recommended to use by people like me, this is basically useless. a bit of documentation to explain what it does and how to use it, along with making the code readable, would go a long way

this PR's version: https://interwiki.scpwiki.com/pr-preview/pr-30/resizeIframe.js

[github-actions]

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