Updated Readme files

pkg/writers/prisma/README.md

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+# Prisma Writer
+
+Generates Prisma schema files from database schema information.
+
+## Overview
+
+The Prisma Writer converts RelSpec's internal database model representation into Prisma schema language (`.prisma` files), complete with models, fields, relationships, and attributes.
+
+## Features
+
+- Generates Prisma schema syntax
+- Creates model definitions with proper field types
+- Adds Prisma attributes (@id, @unique, @default, etc.)
+- Generates relationship fields
+- Includes datasource and generator configurations
+- Maps table/column names with @map and @@map
+
+## Usage
+
+### Basic Example
+
+```go
+package main
+
+import (
+    "git.warky.dev/wdevs/relspecgo/pkg/models"
+    "git.warky.dev/wdevs/relspecgo/pkg/writers"
+    "git.warky.dev/wdevs/relspecgo/pkg/writers/prisma"
+)
+
+func main() {
+    options := &writers.WriterOptions{
+        OutputPath: "schema.prisma",
+        Metadata: map[string]interface{}{
+            "datasource_provider": "postgresql",
+        },
+    }
+
+    writer := prisma.NewWriter(options)
+    err := writer.WriteDatabase(db)
+    if err != nil {
+        panic(err)
+    }
+}
+```
+
+### CLI Examples
+
+```bash
+# Generate Prisma schema from PostgreSQL database
+relspec --input pgsql \
+  --conn "postgres://localhost/mydb" \
+  --output prisma \
+  --out-file schema.prisma
+
+# Convert GORM models to Prisma
+relspec --input gorm --in-file models.go --output prisma --out-file schema.prisma
+
+# Convert JSON to Prisma schema
+relspec --input json --in-file database.json --output prisma --out-file prisma/schema.prisma
+```
+
+## Generated Code Example
+
+```prisma
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+generator client {
+  provider = "prisma-client-js"
+}
+
+model User {
+  id        Int      @id @default(autoincrement())
+  username  String   @unique @db.VarChar(50)
+  email     String   @db.VarChar(100)
+  bio       String?  @db.Text
+  createdAt DateTime @default(now()) @map("created_at")
+
+  posts Post[]
+
+  @@map("users")
+}
+
+model Post {
+  id      Int     @id @default(autoincrement())
+  userId  Int     @map("user_id")
+  title   String  @db.VarChar(200)
+  content String? @db.Text
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+
+  @@map("posts")
+}
+```
+
+## Supported Prisma Attributes
+
+### Field Attributes
+- `@id` - Primary key
+- `@unique` - Unique constraint
+- `@default()` - Default value
+- `@map()` - Column name mapping
+- `@db.*` - Database-specific types
+- `@relation()` - Relationship definition
+
+### Model Attributes
+- `@@map()` - Table name mapping
+- `@@unique()` - Composite unique constraints
+- `@@index()` - Index definitions
+- `@@id()` - Composite primary keys
+
+## Type Mapping
+
+| SQL Type | Prisma Type | Database Type |
+|----------|-------------|---------------|
+| bigint | Int | @db.BigInt |
+| integer | Int | - |
+| varchar(n) | String | @db.VarChar(n) |
+| text | String | @db.Text |
+| boolean | Boolean | - |
+| timestamp | DateTime | @db.Timestamp |
+| uuid | String | @db.Uuid |
+| json | Json | - |
+
+## Notes
+
+- Model names are PascalCase (e.g., `User`, `Post`)
+- Field names are camelCase with `@map` for snake_case columns
+- Table names use `@@map` when different from model name
+- Nullable fields are marked with `?`
+- Relationship fields are automatically generated
+- Datasource provider defaults to `postgresql`