react-template-ts Update dependency react-i18next to v15

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
react-i18next	`14.1.3` -> `15.5.1`

Release Notes

i18next/react-i18next (react-i18next)

`v15.5.1`

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add typescript as optional peer dependency 1843

`v15.5.0`

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feat: use const type parameters for useTranslation() 1842

`v15.4.1`

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fix: unique key warning on componentized element 1835

`v15.4.0`

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feat: add meta with codes on warnings to allow conditional logging 1826

Uses the i18next logger instead of the default console logger, if there is a valid i18next instance. Now the debug i18next option is respected, and you can also inject your own logger module: https://www.i18next.com/misc/creating-own-plugins#logger

`v15.2.0`

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This version may be breaking if you still use React < v18 with TypeScript. For JS users this version is equal to v15.1.4

fix: Global JSX namespace is deprecated 1823 with 1822

`v15.1.4`

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Fix: warning each child should have a unique key 1820

`v15.1.3`

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fix: Self-closing REACT components in translation strings should not attempt to replace the component's children 1815 1816

`v15.1.2`

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fix: Attempted to assign to readonly property 1813

`v15.1.1`

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fix: Not all namespaces are loaded when passing the lng option to useTranslate 1809

`v15.1.0`

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fix: <Trans /> warns 'Each child in a list should have a unique "key" prop.' for react 19 1806

`v15.0.3`

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try to fix unexpected token issue

`v15.0.2`

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try to fix Trans handling with alwaysFormat set to true 1801

`v15.0.1`

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revert arrow function in class property to address this

`v15.0.0`

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use optional chaining, nullish coalescing and nullish coalescing assignment 1774
Build config and optimizations 1769
some dependency updates 1768
use modern hasLoadedNamespace code (now requires at least i18next > v19.4.5 (introduced in june 2020))