feat: Add Obsidian vault configuration and documentation for navigation and memory management

prompts/index.md

@@ -0,0 +1,22 @@
+# Prompts Index
+
+Reusable drafting templates used by workspace commands and agents.
+
+---
+
+## Prompts
+
+- [Copilot Prompt](copilot-prompt.md)
+- [Manager Update](manager-update.md)
+- [Mattermost Translation](mattermost-translation.md)
+- [Standup](standup.md)
+- [Story Draft](story-draft.md)
+
+---
+
+## Related Tooling
+
+- [Tooling Map](../knowledge/maps/tooling.md)
+- [Commands Index](../.opencode/commands/index.md)
+- [Skills Index](../.opencode/skills/index.md)
+