Add FFI bindings for all API functions. Implement getCategories and getFunctions

src/runtime/javascript/jest.config.js

@@ -1,5 +1,9 @@
 /** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
 module.exports = {
   preset: 'ts-jest',
-  testEnvironment: 'node'
-};
+  testEnvironment: 'node',
+  testPathIgnorePatterns: [
+    '<rootDir>/dist/',
+    '<rootDir>/node_modules/'
+  ]
+}