doc: missing highest compatible Microsoft Visual Studio version #61449

Refs: #60869

Situation

The Supported toolchains section of the BUILDING.md document for each active branch specifies only a minimum version of Microsoft Visual Studio using >= as follows. This implicitly includes the current latest version: Visual Studio 2026.

As originally described in issue #60869, Visual Studio 2026 does not work for branches v24.x and lower. Edit: V24.x is now compatible with Visual Studio 2026.

Specifying only a lower bound for the compatible version(s) of Visual Studio with >= notation makes the documentation also potentially inaccurate each time Microsoft releases a new version of Visual Studio. Version detection needs to be added specifically for each Visual Studio release - see for example #60727 for Visual Studio 2026.

According to Visual Studio Product Lifecycle and Servicing

Visual Studio starting with version 2026 follows the Microsoft Product Modern Lifecycle Policy and offers 2 years of support for each new major version. We plan to ship a new major version every year.

The previous cadence of Visual Studio 2019, 2022 and 2026 provided a gap of several years between major versions. When Microsoft releases Visual Studio 2027, 2028, and so on, the "Supported toolchains" documentation will automatically become inaccurate if it continues not to state an upper bound for the version.

Suggestion / Status

Change Supported toolchains to match actual support: