feat: psr-4 and psr-12

[tiller1010]

https://werkbotstudios.teamwork.com/app/tasks/33908188

Summary

• Added psr-4 standard namespaces https://www.php-fig.org/psr/psr-4/
• Added psr-12 code styles https://www.php-fig.org/psr/psr-12/
• Added doctum which uses psr-4 to generate documentation

Testing Steps

• same testing steps as https://github.com/werkbot/silverstripe-module-content/pull/199
• (optional) run the .../php.exe ./vendor/bin/doctum.php update doctum.config.php script from the module directory, this will only generate docs for the module, instead of for the whole project like https://github.com/werkbot/silverstripe-install/blob/feature/doctum/doctum.config.php

Git Flow

• DO NOT delete "release/*" or "hotfix/*" branches after merging a PR. These are used to publish the next release, and they are deleted automatically.
• "Squash and merge" is good on "feature/*" into "develop"
• "Create a merge commit" is good on "release/*" or "hotfix/*" into "master"

[aletail]

This looks good, but while running the update doctum.config.php I did get a parse error...but no extra information with it. It still built the docs

[tiller1010]

This looks good, but while running the update doctum.config.php I did get a parse error...but no extra information with it. It still built the docs

Adding -vvv to the end of the command uses the highest verbosity, which gave...

ERROR: The method "SiteSearchFormResults" has "3" @param tags but only "2" where expected. on "Werkbot\Search\SearchControllerExtension::SiteSearchFormResults" in C:\Users\tille\Desktop\modules\werkbot-search/src\SearchControllerExtension.php:73

[aletail]

Looks great!