feat: add reminders page, BMad skills upgrade, MCP server refactor

- Add reminders page with navigation support
- Upgrade BMad builder module to skills-based architecture
- Refactor MCP server: extract tools and auth into separate modules
- Add connections cache, custom AI provider support
- Update prisma schema and generated client
- Various UI/UX improvements and i18n updates
- Add service worker for PWA support

Made-with: Cursor

.claude/skills/bmad-agent-tech-writer/write-document.md

@@ -0,0 +1,20 @@
+---
+name: write-document
+description: Author a document following documentation best practices
+menu-code: WD
+---
+
+# Write Document
+
+Engage in multi-turn conversation until you fully understand the ask. Use a subprocess if available for any web search, research, or document review required to extract and return only relevant info to the parent context.
+
+## Process
+
+1. **Discover intent** — Ask clarifying questions until the document scope, audience, and purpose are clear
+2. **Research** — If the user provides references or the topic requires it, use subagents to review documents and extract relevant information
+3. **Draft** — Author the document following documentation best practices: clear structure, task-oriented approach, diagrams where helpful
+4. **Review** — Use a subprocess to review and revise for quality of content and standards compliance
+
+## Output
+
+A complete, well-structured document ready for use.