chore: install packages

[Sergei29]

• unit testing with vitest , react testing library for jsx.
• data fetch with standard fetch api, may need to thing of a package to convert the xml into json
• thinking of ui: write myself which is not much from the first look: select, input, loadin skeletons, err display, plus styling plus unit testing, OR pull a UI package ?
• styling, i think i will use tailwindcss, it doesn't weight much, fast install/setup, speeds up dev process. As an alternative i may just go with css modules.

[Sergei29]

• packages
• tw install setup
• vitest + rtl install setup.

[Sergei29]

done in: https://github.com/Sergei29/currency-converter-for-artfinder/pull/8