psake v5.0.0: Two-phase compile/run model, declarative DSL, caching, …

…structured output (#355)

Major version upgrade introducing:
- Two-phase compile/run model (Pester v5-inspired): dependency graph
validated
  via topological sort before any task executes
- Declarative Task syntax: Task 'Build' @{ DependsOn = 'Clean'; Action =
{...} }
  with unknown key validation
- Local file-based caching: tasks with Inputs/Outputs are
content-addressed
  cached in .psake/cache/; unchanged tasks are skipped
- Structured output: Invoke-psake returns PsakeBuildResult with per-task
results
- JSON output: -OutputFormat JSON for CI integration
- Testability APIs: Get-PsakeBuildPlan (inspect plan), Test-PsakeTask
(isolated execution)
- Version declaration: Version 5 pins build scripts to psake major
version
- Hashtable Properties: Properties @{ Config = 'Release' }

Breaking changes:
- Minimum PowerShell version raised to 5.1
- Removed default.ps1 fallback, psake.ps1/psake.cmd runners
- Removed .NET Framework < 4.0 support, deprecated $framework global
- Invoke-psake now returns PsakeBuildResult ($psake.build_success
retained)

https://claude.ai/code/session_01BwHqrE9vCV8R3DoFmvK3Su

---------

Co-authored-by: Claude <noreply@anthropic.com>

Version bump

Update changelog

Reapply changed from #257

I can't explain way, but the changes from PR #257 should have been
merged into master but they aren't there. This commit to to re-apply
them.

Reapply changed from #257

I can't explain way, but the changes from PR #257 should have been
merged into master but they aren't there. This commit to to re-apply
them.

Bump version and update changelog

(GH229) Bump version to v4.7.0 and release

* Bump version to v4.7.0. Update changelog with highlights since last release

* Update copyright

Change Icon to match what was chosen for VSTS Task