docs(pt): Add pt-br translations for Tutorial

[dudusotero]

(WIP) Tutorial's translation for Portuguese lang.

1. Introduction

• [x] a. Basics
• [ ] b. JSX
• [ ] c. Components
• [ ] d. Signals
• [ ] e. Effects
• [ ] f. Derived Signals
• [ ] g. Memos

2. Control Flow

• [ ] a. Show
• [ ] b. For
• [ ] c. Index
• [ ] d. Switch
• [ ] e. Dynamic
• [ ] f. Portal
• [ ] g. Error Boundary

3. Lifecycles

• [ ] a. onMount
• [ ] b. onCleanup

4. Bindings

• [ ] a. Events
• [ ] b. Style
• [ ] c. ClassList
• [ ] d. Refs
• [ ] e. Forwarding Refs
• [ ] f. Spreads
• [ ] g. Directives

5. Props

• [ ] a. Default Props
• [ ] b. Spliting Props
• [ ] c. Children

6. Stores

• [ ] a. Nested Reactivity
• [ ] b. Create Store
• [ ] c. Mutation
• [ ] d. Context
• [ ] e. Immutable Stores
• [ ] f. Without Context

7. Reactivity

• [ ] a. Batching Updates
• [ ] b. Untrack
• [ ] c. On

8. Async

• [ ] a. Lazy Components
• [ ] b. Resources
• [ ] c. Suspense
• [ ] d. Suspense List
• [ ] e. Transitions

Want to help me on this? Contact me on Discord: Eduardo Sotero#9513