Feature: Add on new documentation for zkdb-doc

[SangTran-127]

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[Copilot]

Pull request overview

This PR modernizes the zkDatabase documentation to reflect a major API migration from an authentication-based model to an API key-based architecture, introduces a Result pattern for error handling, and updates the schema definition syntax. The PR also removes outdated authentication documentation and blog content.

Key Changes:

• Migrates from ZkDatabase.connect() with user credentials to new ZkDatabase() with API keys
• Introduces Result pattern (.unwrap(), .isOk(), .isErr()) for error handling across all async operations
• Updates schema syntax from Schema.create() class-based approach to new Schema() array-based field definitions
• Removes authentication-related documentation (sign-up, sign-in, sign-out)

Reviewed changes

Copilot reviewed 34 out of 35 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/dynamic.tsx	Updates all code examples to use new API key authentication, Result pattern, and new Schema syntax
src/components/HomepageFeatures/index.tsx	Code formatting changes (single to double quotes, spacing improvements)
docusaurus.config.ts	Adds type safety for BUILD_MODE environment variable with proper type casting
docs/getting-started.mdx	New file replacing getting-stated.mdx with updated installation and API key setup instructions
docs/intro.md	Updates to reflect Groth16 zkSNARKs usage and removes o1js-specific references
docs/concept/schema.md	Updates schema documentation to new array-based field definition syntax
docs/zk-proof/*.mdx	Updates all zk-proof methods to use Result pattern and new method signatures
docs/verifcation-key/verifcation-key-get.mdx	Updates verification key retrieval to use Result pattern
docs/document/*.mdx	Updates all document operations (insert, update, find, drop, merkle-tree) to use Result pattern
docs/database/*.mdx	Updates database operations (create, info) to use Result pattern and remove merkle height parameter
docs/collection/*.mdx	Updates collection operations (create, list) to use new Schema syntax and Result pattern
docs/group/*.mdx	Updates group operations (create, manage) to use Result pattern
docs/authentication/*	Removes all authentication documentation files (sign-up, sign-in, sign-out)
blog/*	Removes all blog content and configuration files

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