Settings: ignore keys in referenced schema

[create-issue-branch]

Changes

• it is possible to use both "schema_template" and "template" as type in schemas

• added ability to skip key item with entered path using key "skip_paths" in template item definition

  • value can be list of paths or single path
  • Example template

    {
        "type": "template",
        "name": "my_template",
        "skip_paths": "this/will/be/skipped",
        "template_data": {
                "key": "replacement_key"
        }
    }
    

• path can define only static hierarchy (it is not possible to skip item in list or modifiable dict)

  • "path/to/template/key" - valid
  • "path/to/list/item/0" - invalid

• if one of keys is filled dynamically (with template_data) path must contain the formatting key

  • "{key}/enabled" - valid
  • "replacement_key/enabled" - invalid

• template item can have curly brackets in label using double curly bracket "{{root[work]}}"

  • this is inconsisten with schema where curly brackets stay unchanged so it would be nice to make it consistent in future

• all of this filtering happens on template dictionary level it would require changing how schemas are loaded for more advanced feature or behavior

closes #1600

[mkolar]

Can you please add an example for this to the example schema?

[jakubjezek001]

In an example "skip_paths": "this/will/be/skipped", is used and as the plural of paths is used I wonder if string and list value is possible?