Add store and attrs types as generics (backwards compatible)

[AlistairDavidson]

Currently the store and attrs are typed as Record<string, any> and Record<string, string> respectively.

This change allows them to be typed more strictly. This PR is the backwards compatible version of the change, defaulting them to their existing types. A strict patch has also been submitted.

// /api/hello.mts
import type { EnhanceApiFn } from "@enhance/types";

export interface HelloStore {
  name: string;
}

export const get: EnhanceApiFn<HelloStore> = async (req) => ({
  json: {
    name: "Alice"
  }
});

// /pages/hello.mts
import { EnhanceElemFn } from "@enhance/types";
import { HelloStore } from "../api/hello.mjs";

const HelloPage: EnhanceElemFn<unknown, HelloStore> =
    ({ html, state: { store: { data} } }) =>
        html`
            <say-hello salutation="hello"></say-hello>
        `;

export default HelloPage;

// /elements/say-hello.mts
import { EnhanceElemFn } from "@enhance/types";
import { HelloStore } from "../api/hello.mjs";

export interface SayHelloAttrs {
  salutation: string;
}

const SayHello: EnhanceElemFn<SayHelloAttrs, HelloStore> =
	({ html, state: { store: { name }, attrs: { salutation } } }) => html`
		<p>${salutation}, ${name}!</p>
	`

export default SayHello;