docs(pt): translate handbook-v2/Object Types

[guuszz]

Summary

Adds the Brazilian Portuguese translation of Object Types from the TypeScript v2 Handbook, into docs/documentation/pt/handbook-v2/.

This continues the handbook-v2 PT-BR effort (#247–#252). Object Types is page #6 in the reading order and one of the longest/most-consulted pages — it covers property modifiers (optional, readonly), index signatures, excess property checks, extending types, intersections, generic object types, the Array/ReadonlyArray types and tuple types.

Translation choices

• Followed the established pt/ frontmatter convention: translated title and oneline, adapted permalink to /pt/docs/handbook/2/objects.html.
• Preserved every code sample verbatim — all @errors directive lines (21 groups, verified identical to EN via diff), every // ---cut--- (17), all 18 positional markers (// ^? and ^^^^ pointers), and the special twoslash compiler-option directives (// @noLib: true, // @strictPropertyInitialization: false, // @noImplicitAny: false).
• Preserved the <details>/<summary> collapsible block (multiple indexers): translated the prose, kept the code untouched.
• Kept all HTML comments including the large commented-out <!-- TODO --> and <!-- ## Other Kinds... --> sections verbatim.
• Translated JSDoc comments and explanatory comments inside code blocks (e.g. the Array<Type> interface doc-comments); identifiers, strings and sample values left unchanged.
• Kept technical terms with a PT gloss on first use (e.g. assinatura de índice (index signature), verificação de propriedades excedentes (excess property checking), tipos de interseção (intersection types), tipo de tupla (tuple type)).

Source

microsoft/TypeScript-Website @ packages/documentation/copy/en/handbook-v2/Object Types.md

Testing

Read side-by-side with the EN source; verified code fences (128), ---cut--- (17), ^? markers (18), <details> (1) and special compiler-option directives (3) match, and a diff of all @errors codes between EN and PT is empty. Cross-checked terminology against the already-merged pt/ pages and my sibling PRs (#247–#252).