Update to TG 2.5.x (PR 5416 preview)

[tig]

⚠️ DO NOT MERGE with the pre-release pin in place

This PR pins a vendored pre-release build (Terminal.Gui 2.5.0-tig-remove-cm-followup.2, built from tui-cs/Terminal.Gui#5416 head e8aba4230) so the port can be validated ahead of the v2.5.0 release. Before merging, once a public 2.5.x package is on nuget.org:

1. Update the Terminal.Gui pin to the public 2.5.x version in: Directory.Packages.props
2. Delete local_packages/ and the tgui-pr-5416 package source in nuget.config
3. Re-run build and tests and confirm Terminal.Gui restores from nuget.org

(No .gitignore change is needed: nothing in .gitignore covers local_packages/.)

---

Ports PSTui to the Terminal.Gui 2.5.0 preview built from tui-cs/Terminal.Gui#5416 (ConfigurationManager removal), as part of the v2.5.0 ecosystem-validation gate (tui-cs/Terminal.Gui#5630). Pattern precedent: tig/winprint#272.

TEMP: vendored package pin

Terminal.Gui 2.5.x is not on nuget.org yet, so this PR vendors a preview nupkg built from the PR 5416 branch:

• local_packages/Terminal.Gui.2.5.0-tig-remove-cm-followup.2.nupkg (+ .snupkg) committed to the repo — built from PR 5416 head e8aba4230 with an explicitly set version (GitVersion had produced the same followup.1 version string for different commits, which is how a stale build got vendored the first time)
• nuget.config gains a tgui-pr-5416 source pointing at ./local_packages
• Directory.Packages.props pins Terminal.Gui to 2.5.0-tig-remove-cm-followup.2

All three carry TEMP comments. Follow-up: once 2.5.x is published to nuget.org, swap the pin to the public version and delete local_packages/ plus the extra nuget source.

Code changes (2.5.0 API breaks fixed)

• ConfigurationManager / ConfigLocations removed → TuiConfigurationBuilder:
  • OutConsoleGridView.StartUi: ConfigurationManager.AppName = "Out-ConsoleGridView"; ConfigurationManager.Enable(ConfigLocations.All); → new TuiConfigurationBuilder("Out-ConsoleGridView", currentDirectory).ApplyToStaticFacades();
  • ShowObjectView.Run: ConfigurationManager.Enable(ConfigLocations.All) → new TuiConfigurationBuilder("Show-ObjectTree", currentDirectory).ApplyToStaticFacades(); (explicit app name matters here — the entry assembly is pwsh, so app-scoped ./.tui/<cmdlet>.config.json discovery needs it)
  • Both cmdlets pass the PowerShell session's current filesystem location (SessionState.Path.CurrentFileSystemLocation) through ApplicationData.CurrentDirectory into the builder's currentDirectory parameter: pwsh does not sync the process working directory with Set-Location, so without this, ./.tui/ config discovery would resolve against wherever pwsh was launched rather than the user's current location
  • OutGridViewWindowIntegrationTests: dropped the Enable call — 2.5 applies configuration (library defaults, ~/.tui, ./.tui, TUI_CONFIG) automatically at assembly load via TuiConfigurationBuilder.Shared
  • New TuiConfigurationTests (4 tests) pin the config-discovery contract the cmdlets rely on: CWD-relative and explicit-directory discovery of ./.tui/config.json and ./.tui/Out-ConsoleGridView.config.json, and no-throw fallback on malformed config files. The two CWD tests fail against the original followup.1 vendored build (it resolved ./.tui/ against AppContext.BaseDirectory — pwsh's install directory — a regression vs 2.4.x fixed upstream in the PR 5416 branch), which is why the vendored package was rebuilt from the branch head.
• No other 2.5.0 breaks hit: PSTui has no View.Text overrides, no IAcceptTarget usage, and ships no config.json

Verification

• dotnet build: clean, Debug and Release (only pre-existing warnings)
• Clean-cache dotnet restore confirmed to resolve Terminal.Gui from ./local_packages
• Invoke-Build -Configuration Release Clean, Build, Test (what CI runs): 82/82 xUnit passed, 20/20 Pester passed, module packaging (PSTui + Terminal.Gui closure, 26 assemblies — including the Microsoft.Extensions.Configuration.* closure 2.5 adds, derived automatically from deps.json) succeeded
• In-host probe: real pwsh session, Set-Location to a directory containing .tui/Out-ConsoleGridView.config.json with "Theme": "Dark" → the migrated call discovers and applies it while the process CWD points elsewhere

🤖 Generated with Claude Code

https://claude.ai/code/session_01BVbLXNzbus2MTXmiJDBErL