chore: add knip and remove dead code

[Anshumancanrock]

Add Knip checks and remove dead code/dependencies

Description

• Added Knip as a dev dependency and created project config in .knip.json.
• Added npm run knip and wired npm run lint to run Knip before ESLint.
• Removed unused dependencies from runtime deps and moved rxjs to dev deps.
• Removed orphaned dead files (unused runes utils/types/tests, plus unused schema/constants files).
• Updated contributor docs with local Knip usage.

Related Issue

Closes#433

Motivation and Context

This PR adds an automated dead-code/dependency check and removes code/deps that are no longer used, so the codebase stays smaller and easier to maintain.

How Has This Been Tested?

Local verification after rebasing onto latest main:

• npm ci
• npm run build:check
• npm run test:unit (383 passing)
• npm run lint (runs Knip + ESLint)

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.
• All new and existing tests passed.

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	knip@​2.43.0

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[Anshumancanrock]

hii @phoenix-server , could you please take a look at when you get a chance? I’ve added Knip to catch dead code and unused dependencies, cleaned up some unreachable files, and integrated it into the lint pipeline to keep things clean going forward.

[cameri]

@phoenix-server what do each of these lines do when using Knip? Should these be false for this project?

[Anshumancanrock]

Hi @cameri , These are Knip "plugins" that auto-detect dependencies by reading each tool's config file. Setting them to false disables that detection.

However, with --production (which our npm run knip script uses), these flags have no effect as --production already skips devDependency analysis entirely. So they're redundant.

They only matter if someone runs npx knip without --production, where the plugins would flag ~17 devDependencies (like chai, sinon, mochawesome, rxjs, ts-node-dev, etc.) as unused even though they're used by tests/tooling.

I can remove them to keep the config minimal since --production handles it, or keep them as a safety net for manual runs. Happy to go either way , what do you prefer?

[cameri]

Thanks, I just wanted to know what they meant.

[Copilot]

Pull request overview

This PR introduces Knip-based dead-code/dependency checks and removes code/dependencies identified as unused, helping keep the Node/TypeScript codebase smaller and easier to maintain.

Changes:

• Added Knip configuration (.knip.json) and a new npm run knip script; updated npm run lint to run Knip before ESLint.
• Removed unused runtime dependencies and moved rxjs to devDependencies.
• Deleted orphaned/unused “runes” utilities/types/tests and other unused schema/constants files.

Reviewed changes

Copilot reviewed 13 out of 14 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
.knip.json	Adds Knip configuration/entry points for dead code + dependency analysis.
package.json	Adds Knip script, runs it as part of lint, and adjusts dependencies.
package-lock.json	Reflects dependency graph changes (Knip added, deps removed, rxjs moved to dev).
CONTRIBUTING.md	Documents running Knip locally and notes lint now includes Knip.
src/utils/runes/alternative.ts	Removes unused runes alternative implementation.
src/utils/runes/restriction.ts	Removes unused runes restriction implementation.
src/utils/runes/rune-like.ts	Removes unused runes rune-like implementation.
src/@types/runes.ts	Removes unused runes type definitions.
test/unit/utils/runes/alternative.spec.ts	Removes unit tests for deleted runes code.
test/unit/utils/runes/restriction.spec.ts	Removes unit tests for deleted runes code.
test/unit/utils/runes/rune-like.spec.ts	Removes unit tests for deleted runes code.
test/unit/utils/runes.spec.ts	Removes older combined runes unit tests.
src/schemas/http-request-schemas.ts	Removes unused request schema module.
src/constants/payments.ts	Removes unused payments constant enum.

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