Add IDL and JavaScript client

[febo]

This PR uses Codama to generate an IDL and JavaScript client for the ORE program.

The steps required for this were:

• Annotate the API source code to generate an IDL.
• Add Codama configuration
• Set up the JavaScript client folder
• Add supporting scripts

To generate the JavaScript client using Codama from the root of the repository, you may use the following command.

pnpm install
pnpm generate

This will generate the IDL from the API annotation and generate the JavaScript client.

To build the client, go into the client directory and use the following commands.

pnpm install
pnpm build

The Codama IDL for the program is located in ./api/idl.codama.json.

[febo]

Closed in favour of #105