Refactor AI workspace for improved context management and communication integration

- Introduced new commands and skills for workspace memory curation, professional communication, and status reporting.
- Updated existing commands to utilize new skills and improve clarity in instructions.
- Created a new workspace context command to load reusable core and active project profile.
- Enhanced Mattermost inbox integration with support for generic environment variables.
- Established a clear separation between project-independent core logic and project-specific profiles.
- Improved documentation across various files to reflect changes in workflow and command usage.
- Added operational memory management rules to ensure accurate context promotion and correction.
- Updated README and workflow documents to guide users in utilizing the new structure effectively.

.opencode/commands/manager-update.md

@@ -4,6 +4,8 @@ description: Draft or polish a Mattermost update for the current manager or stak
 
 Draft a concise Mattermost message for the current manager or stakeholder in natural, manager-ready US English.
 
+Use `professional-communication` when available.
+
 Read:
 
 @prompts/manager-update.md