feat: add slides for Nebular Summit 2024

Thank you @gfanton <3

Ideas

GRC20 Token: Implement a GRC20 token standard similar to ERC20 in Solidity.
Atomic Swap: Demonstrate a simple atomic swap mechanism. (https://github.com/gnolang/gno/pull/2510)
advanced example of composition
top DAO with two sub DAOs and composing votes
...
Carmel: Implement a system to put money behind responses, similar to a jury system with discovery and responses.
Name Resolution: Create a decentralized name resolution system.
Whitelisting: Develop a whitelisting mechanism for access control.
Boards and Posts: Build a forum-like system with boards and posts.
Memeland: Create a social platform for sharing memes.
Decentralized Exchange (DEX): Implement a simple decentralized exchange.
Remote Appliance Control: Enable remote control of an appliance.
Game Character Movement: Program a game character with customizable movement.
Social Account Recovery: Develop a system for social account recovery.
Full Node Registry: Create a registry for full nodes with a payment system.
Micropayment Channels: Implement micropayment channels for small transactions.
Programmable Datastore: Develop a realm that stores simple data with programmable attributes, similar to a programmable Firebase.
Passwordless Authentication: Create a personal CA system for passwordless authentication using private keys and pubkeys of devices on-chain.