feat: Add timeStamps in attached text

[thepiyush-303]

Brief Title

Now text attachments also include timeStamps beside username just like RC

I have added timestamp in the following way:

if message is from previous month then show date in 'january 28,2025' format.
if message is from previous week but same month then show the date '01/02/2025' format
if message is from same week then show 'day, time'
is message is from same day then show 'time'.

It is inspired by the approach that RC follows, i implement it and found some responsive issues so i also fixed them, check final changes is video.

Acceptance Criteria fulfillment

• [x] Reverse the order of showing message before attachment, since RC follow attachment before message so that I reverse the order
• [x] Include timeStams in both simple and nested-attachment

Fixes #873

Video/Screenshots

https://github.com/user-attachments/assets/883434c8-60b2-4909-bee9-20076f60ec75

PR Test Details

Note: The PR will be ready for live testing at https://rocketchat.github.io/EmbeddedChat/pulls/pr-875 after approval. Contributors are requested to replace <pr_number> with the actual PR number.

[Spiral-Memory]

In EC, the choice between username or name is customizable: You will have to make it dynamic :

Remove @ sign from attachment because RC also doesn't include it.

[thepiyush-303]

@Spiral-Memory Done.

any other changes?

[thepiyush-303]

(same video as above)

https://github.com/user-attachments/assets/883434c8-60b2-4909-bee9-20076f60ec75

Hey @Spiral-Memory, I have added timestamp in the following way:

• if message is from previous month then show date in 'january 28,2025' format.
• if message is from previous week but same month then show the date '01/02/2025' format
• if message is from same week then show 'day, time'
• is message is from same day then show 'time'.

It is inspired by the approach that RC follows, i implement it and found some responsive issues so i also fixed them, check final changes is video.