fix(chat-bubbles): Decrease spacing between chat bubbles (#82)

- Removed my margin-bottom from chat bubbles to decrease spacing
- Ensured a more compact and visually appealing layout

Changes summary:
    - Decreased the spacing between chat bubbles by removing the margin-bottom, resulting in a more compact layout.

src/sass/abstract/_vars.scss

@@ -54,7 +54,7 @@
 	/* ? --- Margins --- */
 	--mt-chat-txt: 0.5rem;
 	--mb-chat-txt: 1rem;
-	--mb-chat-bubble: 2rem;
+	// --mb-chat-bubble: 2rem;
 	--mb-sidebar-nav-li: 0.2rem;
 	--my-pre: 1.5rem;
 

src/sass/elements/_right--main.scss

@@ -37,7 +37,7 @@ main [role='presentation'] {
 [data-testid^='conversation-turn-'] {
 	/* Edit icon in user chat for example. Edit state user chat bg  */
 	--main-surface-tertiary: var(--c-surface-3) !important;
-	margin-bottom: var(--mb-chat-bubble) !important;
+	// margin-bottom: var(--mb-chat-bubble) !important;
 
 	div[data-message-author-role],
 	.prose {