feat: add slides for Nebular Summit 2024

[moul]

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. (feat: add r/demo/atomicswap gno#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.