Chat card screen

[JayaBadarawada]

Creating a new ChatCardScreen to display all the details of a post.

• When a post is clicked, it should navigate to ChatCardScreen.
• On this screen, it will display all the details of the post, including user details, images, emojis from reactions, and comments.
• There will be an input field to add new comments.
• Logged-in users can delete their own comments.
• Super admins will have access to delete all comments.
• Writing functions to add and delete comments to interact with the backend.
• Adding the same ChatCardScreen feature to MessageCard, allowing users to write comments on it.
• On the AddOrEdit screen, the "Spara" button should be disabled if there is no image (for posts with images) or if there is no text (for message posts).
• Fixing the position of the ChatCard and adding IngetActivity as an option to choose a post.
• Adapting tests in ChatCard.