Fix security vulnerabilities in npm dependencies and upgrade .NET framework

[Copilot]

Addresses 37 npm vulnerabilities (7 critical, 19 high) and upgrades from unsupported .NET 5.0 to LTS .NET 8.0.

Changes

npm Dependencies

• Replace deprecated [email protected] with [email protected] - eliminates critical vulnerabilities in fsevents, cross-spawn, form-data, node-gyp, and request
• Upgrade gulp 4.0.0 → 5.0.0 - fixes braces, chokidar, micromatch vulnerabilities
• Update gulp-clean-css 4.2.0 → 4.3.0
• Update gulp-uglify 3.0.0 → 3.0.2
• Update rimraf 2.6.1 → 6.0.1

Result: npm audit reports 0 vulnerabilities

.NET Framework

• Upgrade TargetFramework from net5.0 to net8.0 in Tailspin.SpaceGame.Web.csproj
• .NET 5.0 reached EOL and no longer receives security patches
• .NET 8.0 is current LTS with active security support through November 2026

All changes are dependency version updates only - no code modifications required.

Original prompt

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This section details on the original issue you should resolve

<issue_title>fix any security vulnerability</issue_title>
<issue_description>fix any security vulnerability</issue_description>

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

• Fixes fix any security vulnerability #3

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