content: Expand notes on preloading data

[atilafassina]

Let's expand on how preload works in Solid-Router within or outside a SolidStart app.

• Clarify why usePreloadroute exists if that's the default behavior
• Clarify the advanced usage with deeply nested Lazy components
• Clarify the mechanics/heuristics of how the Router decides to preload/prefetch components and data

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[Copilot]

Pull Request Overview

This PR expands the documentation on data preloading in Solid Router, explaining how preloading works both within and outside SolidStart applications. It provides clarity on when and why to use manual preloading versus automatic preloading behavior.

• Added comprehensive documentation on automatic vs manual preloading behaviors
• Enhanced API documentation for usePreloadRoute with detailed type signatures
• Clarified preloading mechanics with user actions and timing heuristics

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 2 comments.

File	Description
use-preload-route.mdx	Enhanced with usage examples, type signatures, and parameter documentation
preloading.mdx	New comprehensive guide on preloading concepts and advanced usage patterns
data.json	Added preloading guide to advanced concepts navigation
routing-and-navigation.mdx	Minor formatting improvements to code blocks with titles

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[Copilot]

Pull Request Overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated 3 comments.

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