chore: Clean things up after navigation feature

[webJose]

• Export new functions from core only.
• Have Link component type hash using the Hash type.

[Copilot]

Pull Request Overview

This PR cleans up exports and refactors code organization following the implementation of navigation features. It removes some internal functions from the main library exports while reorganizing the codebase for better maintainability.

• Removes exports of internal functions (isConformantState, calculateHref, calculateState) from the main library index
• Extracts resolveHashValue function into its own module and updates all imports
• Updates Link component to use the proper Hash type for the hash property

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/lib/types.ts	Adds comprehensive documentation for NavigateOptions type
src/lib/index.ts	Removes exports of internal core functions
src/lib/index.test.ts	Updates test expectations for removed exports
src/lib/core/resolveHashValue.ts	New module containing extracted resolveHashValue function
src/lib/core/index.ts	Updates exports and file references
src/lib/core/index.test.ts	Updates test expectations for removed exports
src/lib/core/calculateState.ts	Adds overloads and imports resolveHashValue from new location
src/lib/core/calculateState.test.ts	Updates import path
src/lib/core/calculateHref.ts	Major refactoring with new function overloads and improved logic
src/lib/core/RouterEngine.svelte.ts	Removes resolveHashValue function (moved to separate file)
src/lib/core/LocationState.svelte.ts	Adds class documentation
src/lib/core/LocationLite.svelte.ts	Updates import paths
src/lib/core/LocationFull.ts	Adds class documentation
src/lib/RouterTrace/RouterTrace.svelte	Updates import path for resolveHashValue
src/lib/Router/Router.svelte	Updates import path for resolveHashValue
src/lib/Route/Route.svelte	Updates import path for resolveHashValue
src/lib/LinkContext/LinkContext.svelte	Refactors class property initialization
src/lib/Link/Link.svelte	Updates imports and uses proper Hash type
src/lib/Fallback/Fallback.svelte	Updates import path for resolveHashValue

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