Fix output formats for the theme mod get command

[philipjohn]

Fixes #96

I maintained but improved the space-indented formatting for the table format as folks might be using this (as per @schlessera's comment) and then fixed the other formats by using dot notation to represent each field, given the formatter needs arrays with key and value.

For the table format, I opted to remove the => for the value to represent an array. I felt it was harder to read than simply leaving the value blank and letting the indent do the visual work.

For other formats I stripped out anything without a value.

For all formats booleans and empty arrays are represented by a string (e.g. [empty array]. There may be a better way to represent these, and I did consider var_export() but others may have better ideas.

Here are some examples of the new output:

$ wp eval 'print_r(get_theme_mods());'
Array
(
    [0] => 
    [nav_menu_locations] => Array
        (
        )

    [sidebars_widgets] => Array
        (
            [time] => 1749114163
            [data] => Array
                (
                    [wp_inactive_widgets] => Array
                        (
                            [0] => block-2
                            [1] => block-3
                            [2] => block-4
                            [3] => block-5
                            [4] => block-6
                        )

                    [sidebar-1] => Array
                        (
                            [0] => block-7
                        )

                )

        )

)

$ wp theme mod get --all --format=table
+-------------------------+---------------+
| key                     | value         |
+-------------------------+---------------+
| 0                       | [false]       |
| nav_menu_locations      | [empty array] |
| sidebars_widgets        |               |
|   time                  | 1749114163    |
|   data                  |               |
|     wp_inactive_widgets |               |
|       0                 | block-2       |
|       1                 | block-3       |
|       2                 | block-4       |
|       3                 | block-5       |
|       4                 | block-6       |
|     sidebar-1           |               |
|       0                 | block-7       |
+-------------------------+---------------+

$ wp theme mod get --all --format=csv
key,value
0,[false]
nav_menu_locations,"[empty array]"
sidebars_widgets.time,1749114163
sidebars_widgets.data.wp_inactive_widgets.0,block-2
sidebars_widgets.data.wp_inactive_widgets.1,block-3
sidebars_widgets.data.wp_inactive_widgets.2,block-4
sidebars_widgets.data.wp_inactive_widgets.3,block-5
sidebars_widgets.data.wp_inactive_widgets.4,block-6
sidebars_widgets.data.sidebar-1.0,block-7

$ wp theme mod get --all --format=yaml
---
- 
  key: "0"
  value: '[false]'
- 
  key: nav_menu_locations
  value: '[empty array]'
- 
  key: sidebars_widgets.time
  value: 1749114163
- 
  key: sidebars_widgets.data.wp_inactive_widgets.0
  value: block-2
- 
  key: sidebars_widgets.data.wp_inactive_widgets.1
  value: block-3
- 
  key: sidebars_widgets.data.wp_inactive_widgets.2
  value: block-4
- 
  key: sidebars_widgets.data.wp_inactive_widgets.3
  value: block-5
- 
  key: sidebars_widgets.data.wp_inactive_widgets.4
  value: block-6
- 
  key: sidebars_widgets.data.sidebar-1.0
  value: block-7

$ wp theme mod get --all --format=json | jq .
[
  {
    "key": "0",
    "value": "[false]"
  },
  {
    "key": "nav_menu_locations",
    "value": "[empty array]"
  },
  {
    "key": "sidebars_widgets.time",
    "value": 1749114163
  },
  {
    "key": "sidebars_widgets.data.wp_inactive_widgets.0",
    "value": "block-2"
  },
  {
    "key": "sidebars_widgets.data.wp_inactive_widgets.1",
    "value": "block-3"
  },
  {
    "key": "sidebars_widgets.data.wp_inactive_widgets.2",
    "value": "block-4"
  },
  {
    "key": "sidebars_widgets.data.wp_inactive_widgets.3",
    "value": "block-5"
  },
  {
    "key": "sidebars_widgets.data.wp_inactive_widgets.4",
    "value": "block-6"
  },
  {
    "key": "sidebars_widgets.data.sidebar-1.0",
    "value": "block-7"
  }
]

[schlessera]

Looks good, only minor nitpicks for the code. Also, it would be good to have at least 1 feature test covering this.

[philipjohn]

Oh, I will do tests by the way! Just probably not until after this week :)