docs: clarify mounting components with context

[Sushanth012]

Closes #18462.

Summary:

• Renames the context docs section from Component testing to Mounting components with context.
• Clarifies that wrapper-provided context is scoped to the mounted component tree and does not leak across separate mount, hydrate, or render calls.

Validation:

• git diff --check
• pnpm dlx prettier@3.2.4 --check documentation/docs/06-runtime/02-context.md

Notes:

• Docs-only change; full pnpm test and pnpm lint were not run in this sparse clone.

[pkg-svelte-dev]

Install the latest version of svelte from 9ef7778:

pnpm add https://pkg.svelte.dev/svelte/c/9ef7778da7988cbbe41eb83668e73cc13d6298d2

Open in pkg.svelte.dev: https://pkg.svelte.dev/repos/svelte/pr/18515

Note

This PR is from a fork. A maintainer must approve approve each commit before it can be built and installed.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 9ef7778

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