Feature: Some Improvements

[SalvaZaraes]

Import Text from Markdown Files (.md)

Adding the possibility to import text from existing Markdown-formatted files (.md) would streamline the process for users who already have content in Markdown format and want to incorporate it into Mintter.

Sync Progress Bar

It would be helpful to have a progress bar that shows the current sync status with peers, including a percentage to indicate how much of the synchronization process is complete.

Expanded Text Formatting Options

It would be great to have more formatting options, such as changing text color and text alignment(center, left, or right).

Clarify Indentation for Headings

Adjusting heading levels and indentation can be challenging at times. A potential solution could be to assign a distinct number of # symbols to represent different heading levels (e.g., ## for a first-level heading, ### for second level, etc.). This would make it easier to manage heading hierarchy and indentation within documents.

Optimization Issues

I've noticed that whenever I open Mintter, my computer tends to heat up quickly. Could it be due to the background synchronization process?