feat: Enhance Message Report modal and fix the logic of visibility of report option in toolbar

[thepiyush-303]

Brief Title

Acceptance Criteria fulfillment

• Enhance report/modal
• add logic for visibility
• include css

Fixes #904

Video/Screenshots

After:

Screencast.from.2025-01-15.22-12-55.mp4

Before:

Screencast.from.2025-01-15.22-14-36.mp4

PR Test Details

Note: The PR will be ready for live testing at https://rocketchat.github.io/EmbeddedChat/pulls/pr-907 after approval. Contributors are requested to replace <pr_number> with the actual PR number.

[Spiral-Memory]

Hi @thepiyush-303
Thanks for the PR! It looks good to me.

Just one minor change: could you remove the display of the message here?

If you decide to keep the message, there are several cases to handle:

• The markdown should render correctly.
• After a certain message length, it should truncate and display an ellipsis.

[thepiyush-303]

Hey @Spiral-Memory
I made the changes keeping RC's behavior in mind. I believe markdown will render the text perfectly. Regarding truncating the text, I will raise a new PR for it.
or:
If you want me to remove the actual message, please let me know what text should be displayed instead.

[Spiral-Memory]

No need to raise another PR, Pls make the change here and let me know

[thepiyush-303]

instead of truncating and adding ellipsis the behaviour for long text will look like this.

Screencast.from.2025-01-28.18-56-08.mp4

is it ok @Spiral-Memory ?