Co-authored-by: Andrew Liu <[email protected]>

…ting started page (#14120)

The Flutter onboarding documentation in
`docs/platforms/dart/guides/flutter/index.mdx` was updated to align with
Android's `sentry-wizard` installation methods. Previously, only `brew`
and `npx` options were available, which limited support for Windows
users and forced the use of JavaScript tooling.

Changes include:
* Adding five new `sentry-wizard` installation methods: macOS
(Intel/x64, Apple Silicon/arm64), Linux (x64, arm64), and Windows
(PowerShell). This provides direct binary downloads, addressing platform
compatibility.
* Updating the introductory text to explicitly recommend the [Sentry
Wizard](https://github.com/getsentry/sentry-wizard) and linking to its
GitHub repository.
* Refining the post-installation description for consistency with
Android documentation, clarifying the project patching process and
manual setup options.

These updates ensure comprehensive platform coverage and offer native
tooling alternatives, improving accessibility for Flutter developers
across various operating systems.

---------

Co-authored-by: Cursor Agent <[email protected]>
Co-authored-by: getsantry[bot] <66042841+getsantry[bot]@users.noreply.github.com>
Co-authored-by: Giancarlo Buenaflor <[email protected]>

Co-authored-by: Cursor Agent <[email protected]>

…tegration

…smith-integration