feat: adds PayloadMode and Priority enums

[thachp]

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[Copilot]

Pull request overview

This PR enhances the TypeScript type safety for the EventDBX Node.js client by introducing strongly-typed enums for PayloadMode and Priority, along with formal type definitions for JSON-related types (JsonValue, JsonPatch variants). The changes also refactor inline validation logic into reusable functions (normalize_payload_mode and normalize_priority), improving code maintainability.

• Adds PayloadMode and Priority enums with TypeScript definitions and exports
• Introduces JsonValue and JsonPatch type definitions for better type safety
• Refactors validation logic into dedicated normalization functions
• Updates version from 1.4.3 to 1.4.4

Reviewed changes

Copilot reviewed 6 out of 7 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/lib.rs	Adds PayloadMode and Priority enums with string_enum support, defines JsonValue and JsonPatch types, and refactors inline validation into normalize_payload_mode and normalize_priority functions
index.d.ts	Adds TypeScript type definitions for JsonValue, JsonPatch variants, PayloadMode and Priority enums; updates interface properties to use strongly-typed enums instead of plain strings
index.js	Exports PayloadMode and Priority enums to make them available to JavaScript consumers
eventdbx.wasi.cjs	Exports PayloadMode and Priority enums for WASI CommonJS module
eventdbx.wasi-browser.js	Exports PayloadMode and Priority enums for WASI browser module
package.json	Bumps version to 1.4.4
Cargo.toml	Bumps version to 1.4.4

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