Add missing file hook.mjs to published package

[JoshMock]

Installing and importing @elastic/opentelemetry-node in a project raises this error on startup:

npm install && npm run build && npm run start

node:internal/modules/run_main:104
    triggerUncaughtException(
    ^
Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/home/joshmock/Code/mcp-server-elasticsearch/node_modules/@elastic/opentelemetry-node/hook.mjs' imported from /home/joshmock/Code/mcp-server-elasticsearch/node_modules/@elastic/opentelemetry-node/import.mjs
    at finalizeResolution (node:internal/modules/esm/resolve:275:11)
    at moduleResolve (node:internal/modules/esm/resolve:860:10)
    at defaultResolve (node:internal/modules/esm/resolve:984:11)
    at nextResolve (node:internal/modules/esm/hooks:748:28)
    at Hooks.resolve (node:internal/modules/esm/hooks:240:30)
    at ModuleLoader.resolve (node:internal/modules/esm/loader:685:35)
    at ModuleLoader.getModuleJobForImport (node:internal/modules/esm/loader:305:38)
    at onImport.tracePromise.__proto__ (node:internal/modules/esm/loader:643:36)
    at TracingChannel.tracePromise (node:diagnostics_channel:344:14)
    at ModuleLoader.import (node:internal/modules/esm/loader:642:21) {
  code: 'ERR_MODULE_NOT_FOUND',
  url: 'file:///home/joshmock/Code/mcp-server-elasticsearch/node_modules/@elastic/opentelemetry-node/hook.mjs'
}

Node.js v23.11.0

It appears hook.mjs was recently added to the project and loads by default, but it is not included in the package when published to npm.

[trentm]

@JoshMock Thank you! v1.1.0 was a bad release. I'll try to get a release out right away to fix this.

[trentm]

@JoshMock Sorry about that broken release. v1.1.1 is released now with your fix.