fix(daily): récupère la liste des fichiers présents sur le disque

Created by: MichaelBitard

Le daily plante sauvagement avec

2022-08-30 02:04:30 [error] Erreur durant le daily Error: Command failed: find ./packages/api/files | grep pdf
find: ./packages/api/files: No such file or directory

    at checkExecSyncError (node:child_process:851:11)
    at execSync (node:child_process:923:15)
    at filesIndexBuild (/packages/api/dist/src/tools/documents/files-index-build.js:7:53)
    at documentsCheck (/packages/api/dist/src/tools/documents/check.js:14:64)
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)
    at async tasks (/packages/api/dist/src/daily_tasks.js:54:9) {
  status: 1,
  signal: null,
  output: [
    null,
    <Buffer >,
    <Buffer 66 69 6e 64 3a 20 2e 2f 70 61 63 6b 61 67 65 73 2f 61 70 69 2f 66 69 6c 65 73 3a 20 4e 6f 20 73 75 63 68 20 66 69 6c 65 20 6f 72 20 64 69 72 65 63 74 ... 4 more bytes>
  ],
  pid: 367,
  stdout: <Buffer >,
  stderr: <Buffer 66 69 6e 64 3a 20 2e 2f 70 61 63 6b 61 67 65 73 2f 61 70 69 2f 66 69 6c 65 73 3a 20 4e 6f 20 73 75 63 68 20 66 69 6c 65 20 6f 72 20 64 69 72 65 63 74 ... 4 more bytes>
}