feat: added skip to main content links to toc

[berezinant]

No description provided.

[Copilot]

Pull Request Overview

This PR introduces navigation improvements by adding skip-to-main-content links and updating the active table of contents scrolling behavior.

• Added a new constant and logic to handle skip-to-main-content links in the navigation loader.
• Changed the scrolling target in the navbar button to the toc link within an active toc part.

Reviewed Changes

Copilot reviewed 3 out of 8 changed files in this pull request and generated no comments.

File	Description
dokka-subprojects/plugin-base/src/main/resources/dokka/scripts/navigation-loader.js	Adds new skip link functionality by introducing the TOC_SKIP_LINK_CLASS and applying event listeners to the corresponding elements.
dokka-subprojects/plugin-base-frontend/src/main/ui-kit/navbar-button/index.ts	Updates the scroll behavior to target the active toc link rather than the overall active toc part.

Files not reviewed (5)

• dokka-subprojects/plugin-base-frontend/src/main/ui-kit/toc-tree/styles.scss: Language not supported
• dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/renderers/html/NavigationPage.kt: Language not supported
• dokka-subprojects/plugin-base/src/main/resources/dokka/templates/base.ftl: Language not supported
• dokka-subprojects/plugin-base/src/main/resources/dokka/ui-kit/ui-kit.css: Language not supported
• dokka-subprojects/plugin-base/src/main/resources/dokka/ui-kit/ui-kit.min.css: Language not supported

Comments suppressed due to low confidence (1)

dokka-subprojects/plugin-base-frontend/src/main/ui-kit/navbar-button/index.ts:42

• Scrolling the inner '.toc--link' element instead of the parent '.toc--part' may lead to unexpected positioning; please confirm that this change aligns with the intended behavior.

const activePart = document.querySelector('.toc--part[data-active="true"]')?.querySelector('.toc--link');