feat: refactor skills API and database schema

- Replaced file-based skill category loading with API calls in the GET and POST methods of the skills route.
- Added new `SkillsService` for handling skill category operations.
- Updated SQL initialization script to create `skill_categories`, `skills`, and `skill_links` tables with appropriate relationships.
- Enhanced `ApiClient` with methods for loading skill categories and creating new skills, improving API interaction.
- Introduced error handling for skill category creation and loading processes.

scripts/init.sql

@@ -10,6 +10,34 @@ CREATE TABLE teams (
     updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
 );
 
+-- Skill categories table
+CREATE TABLE skill_categories (
+    id VARCHAR(50) PRIMARY KEY,
+    name VARCHAR(100) NOT NULL,
+    icon VARCHAR(100) NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Skills table
+CREATE TABLE skills (
+    id VARCHAR(100) PRIMARY KEY,
+    name VARCHAR(200) NOT NULL,
+    description TEXT,
+    icon VARCHAR(100),
+    category_id VARCHAR(50) REFERENCES skill_categories(id),
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
+-- Skill links table
+CREATE TABLE skill_links (
+    id SERIAL PRIMARY KEY,
+    skill_id VARCHAR(100) REFERENCES skills(id) ON DELETE CASCADE,
+    url TEXT NOT NULL,
+    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
+);
+
 -- Users table
 CREATE TABLE users (
     id SERIAL PRIMARY KEY,
@@ -73,6 +101,8 @@ INSERT INTO teams (id, name, direction) VALUES
 
 -- Indexes for performance
 CREATE INDEX idx_teams_direction ON teams(direction);
+CREATE INDEX idx_skills_category_id ON skills(category_id);
+CREATE INDEX idx_skill_links_skill_id ON skill_links(skill_id);
 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);
@@ -92,6 +122,12 @@ $$ language 'plpgsql';
 CREATE TRIGGER update_teams_updated_at BEFORE UPDATE ON teams
     FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
 
+CREATE TRIGGER update_skill_categories_updated_at BEFORE UPDATE ON skill_categories
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
+CREATE TRIGGER update_skills_updated_at BEFORE UPDATE ON skills
+    FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();
+
 CREATE TRIGGER update_users_updated_at BEFORE UPDATE ON users
     FOR EACH ROW EXECUTE FUNCTION update_updated_at_column();