feat: add nip-25 support

[CKodidela]

Description

Implements NIP-25 (Reactions) support for kind 7 (nostr event reactions) and kind 17 (external content reactions).

• Added EXTERNAL_CONTENT_REACTION = 17 to EventKinds and new tags (Address, Index, Emoji) to EventTags
• Added ReactionEntry type to @types/event
• Created src/utils/nip25.ts with isReactionEvent, isExternalContentReactionEvent, isLikeReaction,
  isDislikeReaction, and parseReaction helpers
• Schema validation: kind 7 must include at least one e tag; kind 17 must include k and i tags
• Wired reaction event types into event-strategy-factory

Related Issue

Closes #578

Motivation and Context

NIP-25 defines how clients express reactions (likes, dislikes, emoji) to notes and external content. This adds
relay-side support for storing, validating, and querying reaction events.

How Has This Been Tested?

• Unit tests for all utility functions (isReactionEvent, isLikeReaction, isDislikeReaction, parseReaction,
  etc.)
• Unit tests for schema validation (valid/invalid kind 7 and kind 17 events)
• Unit tests for event strategy factory routing
• Integration tests covering like, dislike, and emoji reaction scenarios
• All existing tests continue to pass

Screenshots (if appropriate):

N/A

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: f476e60

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

This PR includes changesets to release 1 package

Name	Type
nostream	Minor

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[coveralls]

coverage: 65.082% (+0.3%) from 64.786% — CKodidela:feat/nip-25 into cameri:main

[CKodidela]

@copilot can you add changeset and upadte readme with nip 25 and also add 25 to package.json

[Copilot]

Pull request overview

Adds relay-side support for NIP-25 reactions by introducing reaction kinds/tags, validation rules, and helper utilities, along with unit + integration coverage.

Changes:

• Added NIP-25 constants/types (EXTERNAL_CONTENT_REACTION, reaction-related EventTags, ReactionEntry).
• Implemented src/utils/nip25.ts helpers for identifying/parsing reaction events.
• Extended eventSchema with NIP-25-specific validation and added unit/integration tests for reaction flows.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/constants/base.ts	Adds kind 17 and reaction-related tag constants.
src/@types/event.ts	Introduces ReactionEntry for parsed reaction targets.
src/utils/nip25.ts	Implements NIP-25 reaction detection/parsing helpers.
src/schemas/event-schema.ts	Adds schema refinement enforcing reaction tag requirements.
src/factories/event-strategy-factory.ts	Wires reaction kinds into strategy routing (currently default).
test/unit/utils/nip25.spec.ts	Unit tests for NIP-25 utility helpers.
test/unit/schemas/event-schema.spec.ts	Unit tests for new NIP-25 schema constraints.
test/unit/factories/event-strategy-factory.spec.ts	Tests factory routing for reaction kinds.
test/integration/features/nip-25/nip-25.feature	Cucumber feature scenarios for like/dislike/emoji reactions.
test/integration/features/nip-25/nip-25.feature.ts	Step definitions implementing the NIP-25 feature scenarios.

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[CKodidela]

The commit merge: integrate NIP-65 relay list metadata from main was failing the commitlint check because merge isn't a valid conventional commit type. I amended the message to chore: and force pushed to fix the CI check. No code changes were made to that commit, only the message.

[CKodidela]

@cameri This PR is up for review

[CKodidela]

Will resolve these by EOD tmrw

[CKodidela]

@cameri up for review