Fix grammar, remove duplicates and add missing punctuation

[savvar9991]

1. Fixed grammar in [!NOTE] (line 51):

• zod` is marked as optional peer dependency, so if you all you need is the JSON Schema definitions

• zod` is marked as optional peer dependency, so if all you need is the JSON Schema definitions

Reason: Removed redundant "you" for proper grammar.

2.Added punctuation (line 133):

• Post metadata schema is a union of all content schemas (e.g. ArticleMetadata, AudioMetadata, etc.

• Post metadata schema is a union of all content schemas (e.g. ArticleMetadata, AudioMetadata, etc.).

Reason: Added a period at the end of the sentence for proper punctuation.

3.Improved grammar (line 201):

• Every time you have a discriminated union, you can use the discriminant to narrow the type. See few examples below.

• Every time you have a discriminated union, you can use the discriminant to narrow the type. See a few examples below.

Reason: Added the article "a" before "few examples" for proper grammar.

4.Removed duplication (line 479):

• You can you can use ESModule aliasing to avoid conflicts

• You can use ESModule aliasing to avoid conflicts

Reason: Removed duplicated "you can" to fix redundancy.

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