Move Wagtail’s stylesheets and vendor CSS & image files to client subfolder (#8419)

client/scss/generic/_generic.scss

@@ -1 +0,0 @@
-// generic styles go in this folder.

wagtail/contrib/modeladmin/static_src/wagtailmodeladmin/scss/breadcrumbs_page.scss

@@ -1,2 +0,0 @@
-@import '../../../../../../client/scss/settings';
-@import '../../../../../../client/scss/tools';

wagtail/documents/static_src/wagtaildocs/scss/add-multiple.scss

@@ -1,91 +0,0 @@
-@import '../../../../../client/scss/settings';
-@import '../../../../../client/scss/tools';
-
-.replace-file-input {
-  display: inline-block;
-  position: relative;
-  overflow: hidden;
-  padding-bottom: 2px;
-
-  [type='file'] {
-    padding: 0;
-    opacity: 0;
-    position: absolute;
-    top: 0;
-    inset-inline-end: 0;
-    direction: ltr;
-    width: auto;
-    display: block;
-    font-size: 5em;
-
-    &:hover {
-      cursor: pointer;
-    }
-  }
-
-  &:hover {
-    cursor: pointer;
-
-    button {
-      background-color: $color-teal-darker;
-    }
-  }
-}
-
-.upload-list {
-  > li {
-    padding: 1em;
-  }
-
-  .left {
-    text-align: center;
-    word-break: break-all;
-  }
-
-  .preview {
-    width: 150px;
-    min-height: 150px;
-    display: block;
-    position: relative;
-    text-align: center;
-    max-width: 100%;
-    margin: auto;
-  }
-
-  .progress {
-    box-shadow: 0 0 5px 2px rgba(255, 255, 255, 0.4);
-    max-width: 100%;
-    z-index: 4;
-    margin-inline-start: 20%;
-    margin-inline-end: 20%;
-    width: 60%;
-  }
-
-  .status-msg {
-    display: none;
-  }
-
-  .upload-complete {
-    .progress {
-      opacity: 0;
-    }
-  }
-
-  .upload-success {
-    .status-msg.success {
-      display: block;
-    }
-  }
-
-  .upload-failure {
-    border-color: $color-red;
-
-    .preview {
-      display: none;
-    }
-
-    .status-msg.failure {
-      display: block;
-    }
-  }
-}