feat: support subject tags in text notes and add NIP-14 support coverage

[a-khushal]

This PR adds NIP-14 support so text note events can include a subject tag.

Description

this pr adds support for nip-14 subject tags in text note events (kind 1). it makes sure the tags are accepted, stored, and handled properly, and updates the relay to show support for nip14.

Related Issue

nostream#523

Motivation and Context

this change adds support for nip-14 subject tags in text note events (kind 1). without this, subject tags may not be handled or stored properly. it ensures the relay correctly supports nip-14.

How Has This Been Tested?

locally, ran i ran npm run lint and npm run build:check, and both passed.
also ran unit tests covering schema validation for text note events with ["subject", "..."] and repository coverage.`

Screenshots (if appropriate):

Types of changes

• Non-functional change (docs, style, minor refactor)
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my code changes.
• I added a changeset, or this is docs-only and I added an empty changeset.
• All new and existing tests passed.

[changeset-bot]

🦋 Changeset detected

Latest commit: b9c833d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
nostream	Patch

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[coveralls]

coverage: 74.929%. remained the same — a-khushal:feat/nip14-subject into cameri:main