add support for postgresql driver in function sdk

examples/postgresql/.eslintrc.json

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+{
+  "env": {
+    "es6": true
+  },
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"]
+}

examples/postgresql/.prettierrc

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+{
+  "plugins": ["assemblyscript-prettier"]
+}

examples/postgresql/README.md

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+# Hypermode Functions Example using PostgreSQL database

examples/postgresql/asconfig.json

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+{
+  "extends": "./node_modules/@hypermode/functions-as/plugin.asconfig.json",
+  "options": {
+    "transform": ["@hypermode/functions-as/transform", "json-as/transform"]
+  }
+}

examples/postgresql/assembly/index.ts

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+import { postgresql } from "@hypermode/functions-as";
+
+class Person {
+  ID: i64 = 0;
+  name!: string;
+  age!: i64;
+  home!: postgresql.Point;
+}
+
+export function queryPeople(): Person[] {
+  const resp = postgresql.query<Person>(
+    "neon",
+    "select name, age, home from people",
+  );
+  return resp.rows;
+}
+
+export function getPerson(name: string): Person | null {
+  const query = "select age, home from people where name = $1";
+
+  const params: postgresql.Params = new postgresql.Params();
+  params.push(name);
+
+  const people = postgresql.query<Person>("neon", query, params);
+  return people.rows[0];
+}
+
+export function addPerson(name: string, age: i32, lat: f64, lon: f64): void {
+  const query =
+    "insert into people (name, age, home) values ($1, $2, $3) RETURNING id";
+
+  const params: postgresql.Params = new postgresql.Params();
+  params.push(name);
+  params.push(age);
+  params.push(new postgresql.Point(lat, lon));
+
+  // TODO
+  const people = postgresql.query<Person>("neon", query, params);
+  const person = people.rows[0];
+}

examples/postgresql/assembly/tsconfig.json

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+{
+  "extends": "assemblyscript/std/assembly.json",
+  "include": ["./**/*.ts"]
+}

examples/postgresql/hypermode.json

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+{
+  "$schema": "https://manifest.hypermode.com/hypermode.json",
+  "models": {
+    // No models are used by this example, but if you add any, they would go here.
+  },
+  "hosts": {
+    "neon": {
+      "type": "postgresql",
+      "connString": "postgresql://postgres:password@localhost:5432/data?sslmode=disable"
+    }
+  }
+}