Initial integration of svelte stellar and tailwindcss

[AaronPlave]

This PR integrates TailwindCSS and Stellar Svelte components. TailwindCSS is a CSS utility framework introduced as a soft dependency of Stellar Svelte. Over time the aim is to use TailwindCSS utility classes instead of our custom classes so that all of our styling is responsive to the underlying CSS variables that govern those utility classes from Tailwind. Stellar Svelte is built on top of shadcn-svelte components which uses Tailwind itself for styling and dynamic theming. By using Tailwind in Aerie UI we will be able to dynamically theme (light, dark, global color schemes, etc). Stellar Svelte components will provide us with a large library of high quality, accessible UI components that should also save us development effort.

This PR also:

• Removes the bootstrap utility css and swaps a few of those classes over to TailwindCSS classes.
• Updates typescript to 5.7.3

Testing:

• Test the Tags page. This page now mainly uses Tailwind classes and Svelte Stellar components as a proof of concept.
• Verify that the UI looks unchanged other than the Tags page

TODO:

• Revert plan page changes
• Remove any of the locally installed Stellar components
• Rebase
• Remove command palette
• Explain tailwind css integration and a bit of stellar explainer...
• Remove old app menu if @duranb okays it
• Verify that the rest of the UI looks unchanged
• Fix e2e tests @AaronPlave
• Developer docs, mention things like "dark:some-class", how we like to use TW/how we've customized it, etc.
• Update testing docs to reflect preferences on accessing parts of the page from within a test. Role first (if it doesn't take a rework of the UI and think about the context), then test id, then as a final option some sort of class.

[dandelany]

Met with @AaronPlave & we decided:

• @AaronPlave will rebase this
• Ready for review by @duranb otherwise
• BUT we want to combine the merge of this with TailwindCSS and Svelte Stellar #1666 so we can test them together (ie. avoid testing UI for this if it's changing in TailwindCSS and Svelte Stellar #1666)
• So @bduran please approve when ready but don't merge

[duranb]

Everything looks good! I'll save the more detailed review for the follow up PR.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[AaronPlave]

Closing since this was done in #1666