Add project summary documentation with current status and metadata

Author: jbruwes

.qwen/PROJECT_SUMMARY.md

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+# Project Summary
+
+## Overall Goal
+Maintain and update the flat-json-tree library, a Vue 3 composable for manipulating JSON tree objects by transforming them into flat arrays for easier operations.
+
+## Key Knowledge
+- Project: `@vuebro/flat-json-tree` version 2.1.26 (as of latest update)
+- Technology: TypeScript library with Vue 3 reactivity system
+- Architecture: Vue 3 composable function that transforms JSON trees into flat arrays with computed properties (branch, index, next, parent, prev, siblings)
+- Build: Uses TypeScript compiler (tsc) via `npm run build`
+- Lint: Uses ESLint via `npm run lint` with auto-fix capability
+- Main file: `src/index.ts` contains the primary implementation
+- The library allows standard array operations on tree structures while preserving hierarchical relationships
+
+## Recent Actions
+- Successfully updated project dependencies with `npm update --save`
+- Incremented package version twice using `npm version patch` (from 2.1.24 to 2.1.26)
+- Ran linting with auto-fix (`npm run lint -- --fix`) successfully
+- Completed build process (`npm run build`) with TypeScript compilation
+- No errors encountered during any of these operations
+
+## Current Plan
+1. [DONE] Update dependencies to latest compatible versions
+2. [DONE] Increment patch version (completed twice)
+3. [DONE] Run linting with auto-fix
+4. [DONE] Complete build process
+5. [TODO] Continue with any additional development, testing, or release tasks as needed
+6. [TODO] Prepare for publishing the new version if deployment is the next step
+
+---
+
+## Summary Metadata
+**Update time**: 2025-11-03T14:59:17.509Z