add docs on migration

Author: clairep94

README.md

@@ -26,6 +26,13 @@ The p5.js Editor is a collaborative project created by many individuals, mostly
 
 3. [All Contributors list on the p5.js repository](https://github.com/processing/p5.js?tab=readme-ov-file#contributors) - Explore the All Contributors list to see the wide range of contributions by our amazing community!
 
+> **TypeScript Migration:** 
+> As of July 2025, we are working on migrating the repo to TypeScript as part of the **[p5.js Web Editor pr05 Grant](https://github.com/processing/pr05-grant/wiki/2025-pr05-Program-Page)**.  
+> This migration will occur in two phases:
+> 1. **Grant Work (July – October 31, 2025)** – Setting up TypeScript configuration, tooling, and starting partial migration. Contributions will be **closed** during this period.
+> 2. **Open Contribution (After October 31, 2025)** – TypeScript migration tasks will **open** to all contributors, with guidelines and tutorials available.  
+>
+> For full details, see [TypeScript Migration Plan](./contributor_docs/typescript-migration.md).
 
 ## Acknowledgements 🙏
 

contributor_docs/README.md

@@ -15,6 +15,7 @@ These guides aren't exhaustive, and do not cover all the possible ways you can c
 * [Translations Guidelines](translations.md) - Guidelines for translating the p5.js editor. 
 * [Deployment](deployment.md) - A guide to production deployment, and all platforms that are being used.
 * [Release](./release.md) - A guide to creating a production release.
+* [Typescript Migration](./typescript_migration.md) - About the Typescript Migration project.
 
 
 ## Documents to Create

contributor_docs/typescript_migration.md

@@ -0,0 +1,22 @@
+# TypeScript Migration
+
+This repository is undergoing a TypeScript migration as part of the **2025 pr05 Grant: Incremental Typescript Migration of the p5.js Web Editor**, running **July – October 31, 2025**. Details on the [pr05 grant](https://github.com/processing/pr05-grant/wiki/2025-pr05-Program-Page) and [migration project](https://github.com/processing/pr05-grant/wiki/2025-pr05-Project-List#incremental-typescript-migration-for-the-p5js-editor).
+
+## Phase 1: Grant Work (July – October 31, 2025)
+
+During this period, the grant team will:
+
+- Configure and enable TypeScript across the project (`tsconfig`, linting, type checking, etc).
+- Set up linting, testing, and other related developer tooling for TS.
+- Begin migrating selected JavaScript files to TypeScript.
+- Prepare documentation and workflow so migration tasks can become **good first issues** for new contributors.
+
+> **Note:** While this initial setup and partial migration is in progress, contributions to the migration itself will **not** be open to the public.
+
+## Phase 2: Open Contribution (After October 31, 2025)
+
+When the grant period ends:
+
+- The migration effort will open up to all contributors.
+- This section will include **guidelines, tutorials, and examples** for migrating files from JavaScript to TypeScript in this project.
+- Migration tasks will be clearly labeled in the issue tracker (e.g., `good first issue`, `typescript migration`).