[API] pages translation

[szymonlicau]

URL previews:
https://vuejs.org/api/
https://vuejs.org/api/composition-api-setup.html (example API category page)

Files to be translated:

• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/ApiIndex.vue
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/index.md

As well as each of the API category pages:

• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/application.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/built-in-components.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/built-in-directives.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/built-in-special-attributes.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/built-in-special-elements.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/compile-time-flags.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/component-instance.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/composition-api-dependency-injection.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/composition-api-lifecycle.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/composition-api-setup.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/custom-renderer.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/general.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/index.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/options-composition.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/options-lifecycle.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/options-misc.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/options-rendering.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/options-state.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/reactivity-advanced.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/reactivity-core.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/reactivity-utilities.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/render-function.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/sfc-css-features.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/sfc-script-setup.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/sfc-spec.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/ssr.md
• https://github.com/monterail/vue3-docs-pl/blob/main/src/api/utility-types.md