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

[dudusotero]

(WIP) Tutorial's translation for Portuguese lang.

1. Introduction

• 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