Fix WP CLI get task command & add tests

[ilicfilip]

WP CLI get task command wasnt working after recent refactors, this PR fixes it and adds tests for following WP CLI commands (if WP CLI is available):

  | test_task_list                           | Lists tasks in JSON format 
  | test_task_list_table_format              | Lists tasks in table format             |
  | test_task_create                         | Creates a task with required fields     |
  | test_task_create_without_required_fields | Verifies error without task_id/title    |
  | test_task_get                            | Gets a single task by ID                |
  | test_task_get_not_found                  | Verifies error for non-existent task    |
  | test_task_update                         | Updates a task's status                 |
  | test_task_delete                         | Deletes a task and verifies removal     |
  | test_full_crud_cycle                     | Complete create/read/update/delete flow |

[github-actions]

Test merged PR on Playground
Test this pull request on the Playground
or download the zip

[github-actions]

✅ Code Coverage Report

Metric	Value
Total Coverage	30.99% 📉
Base Coverage	29.86%
Difference	📈 1.13%

⚠️ Coverage below recommended 40% threshold

🎉 Great job maintaining/improving code coverage!

📊 File-level Coverage Changes (1 files)

📈 Coverage Improved

Class	Before	After	Change
Progress_Planner\WP_CLI\Task_Command	0.00%	83.78%	+83.78%

ℹ️ About this report

• All tests run in a single job with Xdebug coverage
• Security tests excluded from coverage to prevent output issues
• Coverage calculated from line coverage percentages

[github-actions]

Composer package changes

Dev Packages	Operation	Base	Target
composer/ca-bundle	New	-	1.5.10
composer/class-map-generator	New	-	1.7.0
composer/composer	New	-	2.9.2
composer/metadata-minifier	New	-	1.0.0
composer/spdx-licenses	New	-	1.5.9
eftec/bladeone	New	-	3.52
gettext/gettext	New	-	v4.8.12
gettext/languages	New	-	2.12.1
justinrainbow/json-schema	New	-	6.6.3
marc-mabe/php-enum	New	-	v4.7.2
mck89/peast	New	-	v1.17.4
nb/oxymel	New	-	v0.1.0
seld/jsonlint	New	-	1.11.0
seld/phar-utils	New	-	1.2.1
seld/signal-handler	New	-	2.0.2
symfony/polyfill-php73	New	-	v1.33.0
wp-cli/cache-command	New	-	v2.2.1
wp-cli/checksum-command	New	-	v2.3.2
wp-cli/config-command	New	-	v2.4.0
wp-cli/core-command	New	-	v2.1.22
wp-cli/cron-command	New	-	v2.3.2
wp-cli/db-command	New	-	v2.1.3
wp-cli/embed-command	New	-	v2.1.0
wp-cli/entity-command	New	-	v2.8.4
wp-cli/eval-command	New	-	v2.2.7
wp-cli/export-command	New	-	v2.1.14
wp-cli/extension-command	New	-	v2.1.24
wp-cli/i18n-command	New	-	v2.6.6
wp-cli/import-command	New	-	v2.0.15
wp-cli/language-command	New	-	v2.0.25
wp-cli/maintenance-mode-command	New	-	v2.1.3
wp-cli/media-command	New	-	v2.2.2
wp-cli/mustache	New	-	v2.14.99
wp-cli/mustangostang-spyc	New	-	0.6.3
wp-cli/package-command	New	-	v2.6.1
wp-cli/php-cli-tools	New	-	v0.12.6
wp-cli/rewrite-command	New	-	v2.0.16
wp-cli/role-command	New	-	v2.0.16
wp-cli/scaffold-command	New	-	v2.5.1
wp-cli/search-replace-command	New	-	v2.1.9
wp-cli/server-command	New	-	v2.0.15
wp-cli/shell-command	New	-	v2.0.16
wp-cli/super-admin-command	New	-	v2.0.16
wp-cli/widget-command	New	-	v2.1.12
wp-cli/wp-cli	New	-	v2.12.0
wp-cli/wp-cli-bundle	New	-	v2.11.0
wp-cli/wp-config-transformer	New	-	v1.4.3

[ilicfilip]

I have changed approach:

Initially WP CLI commands were triggered like they are triggered from the command line, using exec. This worked fine locally (since it actually ran in local repo, not the test WP instance) but didnt in CI. To make it work I had to symlink repo to the test WP instance, create wp-config.php, install WP core, activate the plugin, change wp table prefix..

Now the WP CLI commands are tested from PHP directly, not using the exec command. This doesn't require any of the above steps and it is much faster. Also it feels more natural since.. this are PHP Unit tests.
The only setup change is that WP CLI is now required as dev composer dependency.