Fix RTL styling on Connectors, Font Library, and boot-based admin pages (#76496)

Co-authored-by: jorgefilipecosta <jorgefilipecosta@git.wordpress.org>
Co-authored-by: mukeshpanchal27 <mukesh27@git.wordpress.org>
Co-authored-by: youknowriad <youknowriad@git.wordpress.org>
Co-authored-by: nikunj8866 <nikunj8866@git.wordpress.org>
Co-authored-by: t-hamano <wildworks@git.wordpress.org>

Author: 5 people

packages/boot/src/components/root/style.scss

@@ -33,7 +33,7 @@
 		position: fixed;
 		top: 0;
 		bottom: 0;
-		left: 0;
+		inset-inline-start: 0;
 		width: 300px;
 		max-width: 85vw;
 		background: var(--wpds-color-bg-surface-neutral-weak, #f0f0f0);
@@ -76,7 +76,7 @@
 
 		.boot-layout--single-page & {
 			margin-top: 0;
-			margin-left: 0;
+			margin-inline-start: 0;
 		}
 	}
 }

packages/wp-build/templates/page-wp-admin.php.template

@@ -231,7 +231,7 @@ function {{PREFIX}}_{{PAGE_SLUG_UNDERSCORE}}_wp_admin_render_page() {
 
 		/* Reset wp-admin padding */
 		#wpcontent {
-			padding-left: 0;
+			padding-inline-start: 0;
 		}
 		#wpbody-content {
 			padding-bottom: 0;
@@ -247,14 +247,14 @@ function {{PREFIX}}_{{PAGE_SLUG_UNDERSCORE}}_wp_admin_render_page() {
 
 		/* Accessibility regions */
 		.a11y-speak-region {
-			left: -1px;
+			inset-inline-start: -1px;
 			top: -1px;
 		}
 
 		/* Admin menu indicators */
 		ul#adminmenu a.wp-has-current-submenu::after,
 		ul#adminmenu > li.current > a.current::after {
-			border-right-color: #fff;
+			border-inline-end-color: #fff;
 		}
 
 		/* Media frame fix */