Implement "Read More" Feature for Long Post Captions

[Shruti-1910]

Description:

Currently, when a post caption exceeds a certain length, only the first few lines are displayed. There is no indication that the caption is truncated, nor is there a provision for users to view the full caption. This can lead to confusion and incomplete understanding of the post content. The app should provide a way to indicate truncated captions and allow users to view the entire caption.

Expected Behavior:

• When a post caption exceeds the specified length, only the first few lines should be displayed initially.
• An indication (e.g., "...read more") should be provided to inform users that the caption is truncated.
• Clicking on the "...read more" link should expand the caption to display the full text.

Acceptance Criteria:

1.User Interface:

• Long captions should be truncated to the first few lines (exact length to be determined).
• A clickable "...read more" link should appear at the end of the truncated caption to indicate that more text is available.
• When the "...read more" link is clicked, the full caption should be displayed in place.

2.Functionality:

• The caption should be truncated dynamically based on the specified length limit.
• The "...read more" link should expand the caption to show the full text without reloading the page.
• The expanded caption should seamlessly integrate with the rest of the post content.