[TRI-2209] CLI init: If there's no include in the tsconfig.ts file then don't add trigger.config.ts to it (v3)

[matt-aitken]

If you don't have include in your tsconfig.json TypeScript includes all TypeScript files inside the project directory.

Currently our CLI adds trigger.config.ts to include always.

{
  "extends": "@tsconfig/node18/tsconfig.json",
  "compilerOptions": {
    "module": "esnext",
    "moduleResolution": "node",
    "resolveJsonModule": true,
    "jsx": "preserve",
    "noUncheckedIndexedAccess": true
  },
  "include": ["trigger.config.ts"] // <= this is the newly added line
}

This breaks TypeScript for every other files because now they don't match anymore.

Fix

If there's no existing include then don't add trigger.config.ts.

_TRI-2209