feat: add PostgreSQL support and enhance evaluation loading

- Added `pg` and `@types/pg` dependencies for PostgreSQL integration.
- Updated `useEvaluation` hook to load user evaluations from the API, improving data management.
- Refactored `saveUserEvaluation` and `loadUserEvaluation` functions to interact with the API instead of localStorage.
- Introduced error handling for profile loading and evaluation saving to enhance robustness.
- Added new methods for managing user profiles and evaluations, including `clearUserProfile` and `loadEvaluationForProfile`.

scripts/init.sql

@@ -0,0 +1,75 @@
+-- Create enum for skill levels
+CREATE TYPE skill_level_enum AS ENUM ('never', 'not-autonomous', 'autonomous', 'expert');
+
+-- Users table
+CREATE TABLE users (
+    id SERIAL PRIMARY KEY,
+    first_name VARCHAR(100) NOT NULL,
+    last_name VARCHAR(100) NOT NULL,
+    team_id VARCHAR(50) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- User evaluations table
+CREATE TABLE user_evaluations (
+    id SERIAL PRIMARY KEY,
+    user_id INTEGER REFERENCES users(id) ON DELETE CASCADE,
+    last_updated TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(user_id)
+);
+
+-- Category evaluations table
+CREATE TABLE category_evaluations (
+    id SERIAL PRIMARY KEY,
+    user_evaluation_id INTEGER REFERENCES user_evaluations(id) ON DELETE CASCADE,
+    category VARCHAR(100) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(user_evaluation_id, category)
+);
+
+-- Selected skills table (skills the user wants to evaluate)
+CREATE TABLE selected_skills (
+    id SERIAL PRIMARY KEY,
+    category_evaluation_id INTEGER REFERENCES category_evaluations(id) ON DELETE CASCADE,
+    skill_id VARCHAR(100) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(category_evaluation_id, skill_id)
+);
+
+-- Skill evaluations table
+CREATE TABLE skill_evaluations (
+    id SERIAL PRIMARY KEY,
+    category_evaluation_id INTEGER REFERENCES category_evaluations(id) ON DELETE CASCADE,
+    skill_id VARCHAR(100) NOT NULL,
+    level skill_level_enum NOT NULL,
+    can_mentor BOOLEAN DEFAULT FALSE,
+    wants_to_learn BOOLEAN DEFAULT FALSE,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    UNIQUE(category_evaluation_id, skill_id)
+);
+
+-- Indexes for performance
+CREATE INDEX idx_users_team_id ON users(team_id);
+CREATE INDEX idx_user_evaluations_user_id ON user_evaluations(user_id);
+CREATE INDEX idx_category_evaluations_user_evaluation_id ON category_evaluations(user_evaluation_id);
+CREATE INDEX idx_selected_skills_category_evaluation_id ON selected_skills(category_evaluation_id);
+CREATE INDEX idx_skill_evaluations_category_evaluation_id ON skill_evaluations(category_evaluation_id);
+CREATE INDEX idx_skill_evaluations_skill_id ON skill_evaluations(skill_id);
+
+-- Update trigger for users table
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = CURRENT_TIMESTAMP;
+    RETURN NEW;
+END;
+$$ language 'plpgsql';
+
+CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+CREATE TRIGGER update_skill_evaluations_updated_at BEFORE UPDATE ON skill_evaluations
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();