fix(core): fix CommonJS usage of @composio/core by moving bundler from tsup to tsdown

[jkomyno]

This PR closes #2217.

• in e6ee55a, I added a CommonJS example in ts/examples/cjs.
  You can reproduce the issue's error by running:

  ❯ pnpm start     
  
  > cjs-example@0.1.0 start ts/examples/cjs
  > node ./src/index.cjs
  
  Creating custom tool...
  TypeError: (0 , import_zod_to_json_schema.default) is not a function
      at CustomTools.createTool (ts/packages/core/dist/index.cjs:2131:64)
      at instance.<computed> [as createTool] (ts/packages/core/dist/index.cjs:1663:39)
      at Tools.createCustomTool (ts/packages/core/dist/index.cjs:3475:29)
      at instance.<computed> [as createCustomTool] (ts/packages/core/dist/index.cjs:1663:39)
      at main (ts/examples/cjs/src/index.cjs:10:37)
      at Object.<anonymous> (ts/examples/cjs/src/index.cjs:31:1)
      at Module._compile (node:internal/modules/cjs/loader:1529:14)
      at Module._extensions..js (node:internal/modules/cjs/loader:1613:10)
      at Module.load (node:internal/modules/cjs/loader:1275:32)
      at Module._load (node:internal/modules/cjs/loader:1096:12) {
    errorId: '94f12584-1cfc-4bfe-925c-d6d327ba629d'

• in 03d4d78, I ported @composio/core's bundler from tsup (which uses rollup under the hood) to tsdown (which uses rolldownunder the hood. You can observe how the issue's error no longer applies:

  ❯ pnpm start
  
  > cjs-example@0.1.0 start ts/examples/cjs
  > node ./src/index.cjs
  
  Creating custom tool...
  Custom tool created: {
    name: 'My Custom Tool',
    slug: 'MY_CUSTOM_TOOL',
    description: 'A custom tool that does something specific',
    inputParameters: {
      title: 'My Custom Tool',
      type: 'object',
      description: 'A custom tool that does something specific',
      properties: { param1: [Object] },
      required: [ 'param1' ]
    },
    outputParameters: {
      type: 'object',
      title: 'Response for My Custom Tool',
      properties: {}
    },
    tags: [],
    toolkit: { name: 'custom', slug: 'custom' }
  }

• in a71c91d, I fixed the pnpm audit --prod check

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