textual 2.0.0 support

[gepbird]

Is there an existing proposal for this?

• I have searched the existing proposals

Is your feature request related to a problem?

In nixpkgs we try to use the latest python packages. I noticed that most of the snapshot tests are failing when trying to use memray 1.15.0 with textual 2.0.0.

Here are the snapshot test results: https://gist.github.com/gepbird/a9b29ca97046ab5351867b72b6d7b955
Looks like some colors have changed (eg. red "Table updates paused" instead of orange), but a regression is icons not being resolved (eg. :compass: instead of 🧭 ).

Describe the solution you'd like

Bump textual and figure out why were the icons not resolved, update the snapshot tests.

Alternatives you considered

Temporarily disabling tests on our side.

[godlygeek]

I've entered Textualize/textual#5545 to ask whether the loss of support for emoji shortcodes is intentional or not, since that will determine our path forward here.