Update default `_projr.yml` file and add `_projr-archive.yml`

[MiguelRodo]

Default _projr.yml:

directories:
  data-raw:
    path: _data_raw
  cache:
    path: _tmp
  output:
    path: _output
  docs:
    path: docs
build:
  github:
    input:
      content: data-raw
      structure: latest
    output:
      content:
      - output
      - docs
      structure: latest

Default _projr-archive.yml:

build:
  github:
    archive:
      content:
      - data-raw
      - docs
      - output
      structure: version
      send:
        sync-approach: sync-using-deletion
        version-source: none

[MiguelRodo]

Note: if there is no GitHub remote, then make sure these are removed.

[MiguelRodo]

Done