Feature/build pipelines for releases

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[Copilot]

Pull Request Overview

This PR adds automated build pipelines for plugin releases, updates project targets to .NET Framework 4.8, and introduces URL credential‐stripping logic with accompanying tests.

• Introduce PowerShell build scripts (plgx-build.ps1, plgx-build-install-run-loop.ps1) and a GitHub Actions workflow for release packaging.
• Update both main and test projects to target .NET Framework 4.8.
• Add StripUserInfo in FaviconDownloader, logging, and unit tests for credential stripping.

Reviewed Changes

Copilot reviewed 10 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
plgx-build.ps1	New PS script for cleaning, building, packaging, and deploying plugin
plgx-build-install-run-loop.ps1	Loop script to rebuild, install, and run KeePass on exit
YAFD/YetAnotherFaviconDownloader.csproj	Target framework bumped from v4.5 to v4.8
YAFD/Util.cs	Add file-based debug logging
YAFD/FaviconDownloader.cs	Add StripUserInfo helper and invoke it in URL validation
Tests/Tests.csproj	Updated to .NET 4.8; add test for IsValidURL
Tests/IsValidURLTest.cs	New tests covering user‐info stripping
SECURITYAUDIT.md	Detailed security audit documentation
BUILD.md	New build and run guide
.github/workflows/build-and-release.yml	CI workflow for build and release

Files not reviewed (1)

• YAFD/Properties/Resources.Designer.cs: Language not supported

Comments suppressed due to low confidence (4)

BUILD.md:6

• Update this prerequisite to .NET Framework 4.8 targeting pack to match the project’s updated target framework.

* .NET Framework 4.5 targeting pack (VS installs it)

BUILD.md:53

• [nitpick] This instruction is duplicated later in the file (around line 108); consider removing the redundant block to clean up the documentation.

Include the output of `msbuild -version` and `KeePass.exe --version` when opening build‐related issues.

Tests/IsValidURLTest.cs:28

• Add additional test cases for URLs without a schema when automatic prefixing is enabled and disabled, to verify the prefix logic in IsValidURL.

        [DataTestMethod]

.github/workflows/build-and-release.yml:23

• Invoke the PowerShell script explicitly using pwsh -NoProfile -ExecutionPolicy Bypass -File .\plgx-build.ps1 to ensure it executes correctly on the Windows runner.

        run: plgx-build.ps1