Migrate to Bootstrap 5 (#918)

* Migrate to Bootstrap 5

* Fix dropdown

* Fix horizontal line color

* Fix vertical line

* Migrate bootstrap on example site

* Fix style issue + scroll spy

Signed-off-by: hossainemruz <hossainemruz@gmail.com>

---------

Signed-off-by: hossainemruz <hossainemruz@gmail.com>
Co-authored-by: Emruz Hossain <hossainemruz@gmail.com>

assets/styles/components/buttons.scss

@@ -49,6 +49,15 @@
   color: get-light-color('muted-text-color');
 }
 
+.navbar-toggler {
+  border: none;
+  &:focus {
+    border: none;
+    outline: none !important;
+    box-shadow: none;
+  }
+}
+
 .tags {
   text-align: left;
   padding-top: 0.5em;

assets/styles/components/cards.scss

@@ -50,6 +50,7 @@
 
   .post-card-link {
     text-decoration: none !important;
+    color: get-light-color('text-color');
   }
 
   .card {

assets/styles/components/links.scss

@@ -2,6 +2,10 @@ a {
   color: get-light-color('accent-color');
   @include transition();
 
+  &:link {
+    text-decoration: none;
+  }
+
   &:hover,
   &:focus {
     text-decoration: get-light-color('hover-over-accent-color') underline;