Update screenshots in README and documentation

[slowsage]

I'm on arch and cannot see the borders as in the screenshots on the github page for taskwarrior-tui. Please see image below. I feel like it must be some simple config issue with TERM or something (I tried both xterm and xterm-256color). gitui shows the borders just fine (also based on tui-rs). i went through the docs and could find anything. Apologies if I missed it.

To Reproduce

• I'm using kitty. I also do not see the borders in gnome-terminal and xterm.

Steps to reproduce the behavior:

taskwarrior-tui

Environment (please complete the following information):

• Operating System:Linux

• Installation: arch taskwarrior-tui-git (also tried the cargo install -same issue).

• taskwarrior-tui version: 0.21.1

• task version: 2.6.2

[kdheepak]

Sorry about the confusion. It's working as intended at the moment for you. I just haven't updated the screenshots and the gifs in the README yet. This PR https://github.com/kdheepak/taskwarrior-tui/pull/410 made changes to bring it more in line with taskwarrior aesthetics.

At some point I'd like to add the option to configure the views to optionally use borders.

[slowsage]

Awesome. Both UI's are ok - just wanted to make sure I did not mess something up in the config. Thanks for all the work!