Update README

[fondation451]

No description provided.

[Copilot]

Pull Request Overview

This PR removes personal information from the README and updates contract addresses in the dev environment configuration. The changes make the documentation more generic and suitable for public use by replacing personal account names and addresses with placeholder values.

• Removed personal freighter address and account references from README
• Updated all contract addresses in the dev.json configuration file
• Replaced specific account names with generic placeholders in deployment commands

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
README.md	Removed personal information and replaced specific account names with generic placeholders
address/dev.json	Updated all contract addresses for the development environment

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