* Initial plan

* Remove chat.promptFiles setting and experimental tags from prompt file settings

Co-authored-by: digitarald <8599+digitarald@users.noreply.github.com>

* Fix compilation errors - remove unused imports and fix variable references

Co-authored-by: digitarald <8599+digitarald@users.noreply.github.com>

* Update policy data file to remove chat.promptFiles entry

Co-authored-by: digitarald <8599+digitarald@users.noreply.github.com>

* remove unused collectAgentInstructionsOnly

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Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: digitarald <8599+digitarald@users.noreply.github.com>
Co-authored-by: Harald Kirschner <hkirschner@microsoft.com>
Co-authored-by: Martin Aeschlimann <martinae@microsoft.com>