Update startvs/startvscode scripts to use ".NET" terminology

[Copilot]

Update startvs/startvscode scripts to use ".NET" terminology

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Replace outdated ".NET Core" references with ".NET" in developer scripts

Description

Updates comments and error messages in startvs/startvscode scripts to replace ".NET Core" with ".NET", aligning with modern branding (post-.NET 5).

Files modified:

• startvs.cmd - 4 occurrences
• startvscode.cmd - 4 occurrences
• startvscode.sh - 4 occurrences
• src/ProjectTemplates/scripts/startvs.cmd - 4 occurrences

Changes are limited to text in comments and error messages. Script functionality unchanged.

Fixes #{issue number}

Original prompt

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This section details on the original issue you should resolve

<issue_title>Improve startvs/startvscode scripts</issue_title>
<issue_description>There are a bunch of dev scripts like startvs.cmd that could use some updates. At the very least, they reference ".NET Core" in a bunch of places and those should be changed to ".NET".</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Improve startvs/startvscode scripts #64409

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[adityamandaleeka]

(FYI this was mostly triggered as a test for Copilot PRs, but I guess it is useful)

[Copilot]

Pull Request Overview

This PR updates terminology in developer convenience scripts by replacing outdated ".NET Core" references with ".NET" to align with modern branding conventions (post-.NET 5). The changes are purely textual, affecting only comments and error messages without modifying any script functionality.

Key changes:

• Updated 4 script files to replace ".NET Core" with ".NET" in comments and error messages
• Maintains consistency across startvs and startvscode scripts for both Windows (.cmd) and Linux/Mac (.sh) platforms

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
startvscode.sh	Updated comments and error message to use ".NET" instead of ".NET Core"
startvscode.cmd	Updated comments and error message to use ".NET" instead of ".NET Core"
startvs.cmd	Updated comments and error message to use ".NET" instead of ".NET Core"
src/ProjectTemplates/scripts/startvs.cmd	Updated comments and error message to use ".NET" instead of ".NET Core"

The changes are straightforward and correctly implemented. All instances of ".NET Core" have been appropriately replaced with ".NET" in comments and user-facing error messages across all four modified files. The updates maintain consistency with modern .NET branding while preserving the functionality of the scripts.