chore: add pnpm workspace configuration for apps and packages

doc/implementation-plan.md

@@ -29,7 +29,7 @@ This document outlines the phased implementation approach for DreamChat.
 - [ ] Initialize NestJS app in `apps/backend`
 - [ ] Configure Prisma ORM with PostgreSQL
 - [ ] Install and configure pgvector extension
-- [ ] Define Prisma schema for all entities
+- [ ] Define Prisma schema using multi-file structure (`prisma/models/`)
 - [ ] Configure Jest for unit testing
 - [ ] Set up Swagger/OpenAPI
 - [ ] Implement basic logging (Winston/Pino)
@@ -204,10 +204,15 @@ HUGGINGFACE_API_KEY=hf_...
 
 #### Backend Tasks
 - [ ] Import adapter interface
-- [ ] Text file adapter
+- [ ] Text file adapter (txt, md)
 - [ ] File upload endpoint
 - [ ] Data preprocessor (cleaning)
 - [ ] Basic text chunking
+- [ ] CharacterKnowledge Prisma model
+- [ ] CharacterKnowledgeService
+  - [ ] Import file/URL as knowledge
+  - [ ] Chunk and embed content
+  - [ ] Store in VectorMemory with type='character'
 
 #### Frontend Tasks
 - [ ] Import page
@@ -274,7 +279,8 @@ HUGGINGFACE_API_KEY=hf_...
 - [ ] Predefined scraper: AO3
 - [ ] Predefined scraper: FanFiction.net
 - [ ] URL validation and scraper selection
-- [ ] URL import endpoint
+- [ ] URL import endpoint (stores as CharacterKnowledge)
+- [ ] PDF and Markdown support for character knowledge
 
 #### Frontend Tasks
 - [ ] URL import component