Bundling JS with ESBuild (#702)

* add npm dependencies used in this theme

* implement helper to configure JS and ESBuild

* migrate jquery popper.js bootstrap fontawesome to js bundle

* refactor main.js into smaller pieces, and moved navbar.js to assets

* remove list.js. It adjusts post card height to be the same, but is actually not needed.

* refactored notes.js, search.js, single.js into application.js

* move ityped to js asset, implement experiences horizontal vertical line in css

* align recent post height via css

* migrated home.js and refactored into various sections

* migrated darkMode feature to js bundle

* moved mermaid feature to js bundle

* migrate syntax highlight to js bundle

* migrate katex ( js portion ) to js bundle

* migrate pdf-js to js bundle by delegating to cdn

* set explicit comparisions for feature envvars so js can properly optimize

* removed goat-counter

* more fixes for broken achievements and small bugs

* more bug fixes

* allow configuration of hightlight.js, fix video-player shortcode

* remove jquery all together

* add null handling and fix merge conflicts

Co-authored-by: Aaron Qian <aaron@yeet.io>

layouts/partials/navigators/floating-lang-selector.html

@@ -5,7 +5,7 @@
 
 <div class="dropdown languageSelector">
     <a class="btn dropdown-toggle" href="#" id="languageSelector" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
-        {{ if ne site.Params.showFlags false }}
+        {{ if ne site.Params.features.flags.enable false }}
             {{ $countryCode := partial "helpers/country-code.html" . }}
             <span class="flag-icon flag-icon-{{$countryCode}}"></span>
         {{ end }}
@@ -14,7 +14,7 @@
     <div class="dropdown-menu" aria-labelledby="languageSelector">
         {{ range .Translations }}
         <a class="dropdown-item nav-link languages-item" href="{{ path.Join "/" (cond (eq .Language.Lang "en") "" .Language.Lang) $pageURL }}">
-            {{ if ne site.Params.showFlags false }}
+            {{ if ne site.Params.features.flags.enable false }}
                 {{ $countryCode := partial "helpers/country-code.html" . }}
                 <span class="flag-icon flag-icon-{{$countryCode}}"></span>
             {{ end }}