docs: move technical stuff to its own document

CONTRIBUTING.md

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+# Contribution Guide
+
+## Things to get familiar with
+
+- pnpm - package manager & monorepo
+- React - Front-end framework
+- Svelte - Front-end framework
+- SvelteKit - Svelte meta-framework
+
+## Project Structure
+
+- `apps`
+  - `main` - https://developomp.com
+  - `blog` - https://blog.developomp.com
+  - `portfolio` - https://portfolio.developomp.com
+- `packages` - shared stuff used across different packages
+  - `blog-content` - Contents for the blog
+  - `eslint-config` - ESLint configuration files
+  - `tailwind-config` -tailwindCSS configuration files
+  - `theme` - universal developomp theme
+  - `tsconfig` - TSConfig files
+
+## Setting Up
+
+> **If you are a Windows user:**
+>
+> - Do **NOT** use the Command Prompt (cmd)
+> - Do **NOT** use Windows PowerShell
+> - Run these commands from PowerShell or a Linux terminal such as WSL or Git Bash
+>
+> PowerShell and Windows PowerShell are [different applications](https://learn.microsoft.com/en-us/powershell/scripting/whats-new/differences-from-windows-powershell?view=powershell-7.3).
+
+1. Clone this git repository
+2. Install the following
+   - [NodeJS](https://nodejs.org)
+   - [pnpm](https://pnpm.io/installation)
+3. Install Dependencies
+   ```
+   pnpm install
+   ```
+4. Run whatever command you need either in project root or in individual packages
+   - `pnpm build` - Build all apps and packages
+   - `pnpm dev` - Run all apps and packages locally
+     - blog - http://localhost:3000
+     - main - http://localhost:5173
+     - portfolio - http://localhost:5174
+   - `pnpm lint` - Lint all apps and packages
+   - `pnpm clean` - Remove all auto-generated content such as `node_modules` and `dist`.