feat: implement light client verification methods

.changeset/four-toys-cough.md

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+---
+"@near-js/light-client": patch
+---
+
+Implement light client block and proof verification

packages/light-client/CHANGELOG.md

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+# @near-js/types
+
+## 0.0.3
+
+### Patch Changes
+
+- [#1103](https://github.com/near/near-api-js/pull/1103) [`b713ae78`](https://github.com/near/near-api-js/commit/b713ae78969d530e7e69e21e315e3d3fdb5e68e9) Thanks [@austinabell](https://github.com/austinabell)! - Implement light client block retrieval and relevant types
+
+- [#1106](https://github.com/near/near-api-js/pull/1106) [`bc53c32c`](https://github.com/near/near-api-js/commit/bc53c32c80694e6f22d9be97db44603591f0026b) Thanks [@austinabell](https://github.com/austinabell)! - Adds missing timestamp_nanosec field to light client proof header
+
+- [#1105](https://github.com/near/near-api-js/pull/1105) [`8c6bf391`](https://github.com/near/near-api-js/commit/8c6bf391a01af9adb81cb8731c45bdb17f5291c0) Thanks [@austinabell](https://github.com/austinabell)! - Adds missing version field in ValidatorStakeView
+
+## 0.0.2
+
+### Patch Changes
+
+- [#1091](https://github.com/near/near-api-js/pull/1091) [`ca458cac`](https://github.com/near/near-api-js/commit/ca458cac683fab614b77eb5daa160e03b0640350) Thanks [@andy-haynes](https://github.com/andy-haynes)! - Only include contents of lib/ in NPM packages

packages/light-client/README.md

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+# @near-js/light-client
+
+NEAR light client verification utilities. Based on the [Light Client spec](https://github.com/near/NEPs/blob/master/specs/ChainSpec/LightClient.md)
+
+# License
+
+This repository is distributed under the terms of both the MIT license and the Apache License (Version 2.0).
+See [LICENSE](https://github.com/near/near-api-js/blob/master/LICENSE) and [LICENSE-APACHE](https://github.com/near/near-api-js/blob/master/LICENSE-APACHE) for details.

packages/light-client/jest.config.js

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+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    collectCoverage: true
+};

packages/light-client/package.json

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+{
+    "name": "@near-js/light-client",
+    "version": "0.0.1",
+    "description": "TypeScript API for NEAR light client verification",
+    "main": "lib/index.js",
+    "scripts": {
+        "build": "pnpm compile",
+        "compile": "tsc -p tsconfig.json",
+        "lint:js": "eslint -c ../../.eslintrc.js.yml test/**/*.js --no-eslintrc",
+        "lint:js:fix": "eslint -c ../../.eslintrc.js.yml test/**/*.js --no-eslintrc --fix",
+        "lint:ts": "eslint -c ../../.eslintrc.ts.yml src/**/*.ts --no-eslintrc",
+        "lint:ts:fix": "eslint -c ../../.eslintrc.ts.yml src/**/*.ts --no-eslintrc --fix",
+        "test": "jest test"
+    },
+    "keywords": [],
+    "author": "",
+    "license": "ISC",
+    "dependencies": {
+        "bn.js": "5.2.1",
+        "@near-js/crypto": "workspace:*",
+        "@near-js/types": "workspace:*",
+        "@near-js/providers": "workspace:*",
+        "@near-js/utils": "workspace:*",
+        "bs58": "^4.0.0",
+        "borsh": "^0.7.0",
+        "js-sha256": "^0.9.0"
+    },
+    "devDependencies": {
+        "@types/node": "^18.11.18",
+        "jest": "^26.0.1",
+        "ts-jest": "^26.5.6",
+        "typescript": "^4.9.4"
+    },
+    "files": [
+        "lib"
+    ]
+}