[Templates] Support added for Next 15

[kerwynrg]

Updates to next@15 support as using this template was causing installation issues by using react 19 + next 14

Description:

• Updated to next@15 support
• eslint, prettier updated and configured to work together
• typescript updated
• Added modifications to next config to support svg url import as well as ReactComponent as mentioned in uui docs assets page
  • No need to use src for default imported svg

[AlekseyManetov]

Could you please elaborate why do we need template here? I see that it also add div wrapper for each icon, probably we can avoid it to not add unnecessary wrappers?
I've asked about config for one of our clients who also use next 15, they share following config

config.module.rules.push({
        test: /\.svg$/i,
        use: [
            {
                loader: '@svgr/webpack',
                options: {
                    svgoConfig: {
                        plugins: [
                            {
                                name: 'preset-default',
                                params: {
                                    overrides: {
                                        removeViewBox: false,
                                    },
                                },
                            },
                        ],
                    },
                },
            },
        ],

Probably name: 'preset-default' resolves issues which you try to resolve by template?

[kerwynrg]

Probably, I'll give it a try and update PR accordingly.

[AlekseyManetov]

Is there any sense to use Suspense without fallback prop?