Changelog for release v7.6.0-preview.6

[Aditya Patwardhan (adityapatwardhan)]

PR Summary

This pull request updates the CHANGELOG/preview.md file to document the upcoming 7.6.0-preview.6 release. It summarizes a wide range of improvements, including engine updates, cmdlet enhancements, tooling and CI workflow changes, test improvements, and build/packaging updates.

Engine and Cmdlet Updates:

• Aliases are now properly expanded to their actual ResolvedCommand, improving reliability of command execution ([release/v7.6] Properly Expand Aliases to their actual ResolvedCommand #26571).
• Several cmdlet improvements: Microsoft.PowerShell.PSResourceGet updated to v1.2.0-preview5, the PSFeedbackProvider experimental feature is now stable, a regression in CompletionCompleters.CompleteFilename() is fixed, a Delimiter parameter is added to Get-Clipboard, and DSC v3 resource for Powershell Profile is introduced ([release/v7.6] Update Microsoft.PowerShell.PSResourceGet to v1.2.0-preview5 #26590, [release/v7.6] Make the experimental feature PSFeedbackProvider stable #26502, [release/v7.6] Fix a regression in the API CompletionCompleters.CompleteFilename() that causes null reference exception #26487, [release/v7.6] Add Delimiter parameter to Get-Clipboard #26572, [release/v7.6] DSC v3 resource for Powershell Profile #26447).
• Multiple experimental features are now stable, and pipe client handles are closed after creating child ssh processes ([release/v7.6] Make some experimental features stable #26490, [release/v7.6] Close pipe client handles after creating the child ssh process #26564).

Tooling and CI Improvements:

• Merge conflict marker detection is added to the linux-ci workflow, and reusable actions for changed files are introduced and used across workflows ([release/v7.6] Add merge conflict marker detection to linux-ci workflow and refactor existing actions to use reusable get-changed-files action #26530, [release/v7.6] Add reusable get-changed-files action and refactor existing actions #26529).
• Analyze job

PR Context

Release updates

PR Checklist

• PR has a meaningful title
  • Use the present tense and imperative mood when describing your changes
• Summarized changes
• Make sure all .h, .cpp, .cs, .ps1 and .psm1 files have the correct copyright header
• This PR is ready to merge. If this PR is a work in progress, please open this as a Draft Pull Request and mark it as Ready to Review when it is ready to merge.
• Breaking changes
  • None
  • OR
  • Experimental feature(s) needed
    • Experimental feature name(s):
• User-facing changes
  • Not Applicable
  • OR
  • Documentation needed
    • Issue filed:
• Testing - New and feature
  • N/A or can only be tested interactively
  • OR
  • Make sure you've added a new test if existing tests do not effectively test the code changed

[Copilot]

Pull request overview

This pull request adds changelog documentation for the v7.6.0-preview.6 release, documenting a comprehensive set of improvements including engine updates, cmdlet enhancements, tooling/CI workflow changes, test improvements, and extensive build/packaging updates.

Key Changes

• Documents engine improvements (alias expansion) and cmdlet updates (PSResourceGet v1.2.0-preview5, stable PSFeedbackProvider, Get-Clipboard enhancements)
• Records tooling and CI workflow improvements (merge conflict detection, reusable actions, workflow refactoring)
• Catalogs extensive build and packaging improvements (28 items) covering migration to native packaging tools, GitHub Actions workflow integration, and various pipeline optimizations

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[Sean Wheeler (sdwheeler)]

LGTM