feat: add files for custom scss + js

assets/js/app.js

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+/** Custom scripts */

assets/scss/app.scss

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+/** Import Bootstrap functions */
+@import "bootstrap/scss/functions";
+
+/** Import theme variables */
+@import "common/variables";
+
+/** Import Bootstrap */
+@import "bootstrap/scss/bootstrap";
+
+/** Import highlight.js */
+// @import "highlight.js/scss/github-dark-dimmed";
+
+/** Import KaTeX */
+@import "katex/dist/katex";
+
+/** Import theme styles */
+@import "common/fonts";
+@import "common/global";
+@import "common/dark";
+@import "components/alerts";
+@import "components/buttons";
+@import "components/code";
+@import "components/details";
+@import "components/syntax";
+@import "components/comments";
+@import "components/forms";
+@import "components/images";
+@import "components/mermaid";
+@import "components/search";
+@import "components/tables";
+@import "layouts/footer";
+@import "layouts/header";
+@import "layouts/pages";
+@import "layouts/posts";
+@import "layouts/sidebar";
+
+/** Import custom styles */
+@import "common/custom";

assets/scss/common/_custom.scss

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+/** Custom styles */