Action dokuwiki.yml: Allow manual triggering

#71: Add initial DW standard Unit Test for this plugin

- .github/workflows/dokuwiki.yml:
- add DW standard action for code style checks
and generic Unit Test execution

- _test/GeneralTest.php

#71: Add initial DW standard Unit Test for this plugin

- .github/workflows/dokuwiki.yml:
- add DW standard action for code style checks
and generic Unit Test execution

- _test/GeneralTest.php:
- initial test for general DW plugin configurations

- update CHANGELOG.md

show more ...

Format code to comply with DW standard code style rules

- add code formatter definitions:
- .editorconfig
- .vscode/settings.json

- update code to meet code style:
- conf/default.php,
con

Format code to comply with DW standard code style rules

- add code formatter definitions:
- .editorconfig
- .vscode/settings.json

- update code to meet code style:
- conf/default.php,
conf/metadata.php,
lang/de/settings.php,
lang/en/settings.php:
- fix for white space code style

- classes/*.php:
- attach classes to plugin specific namespace
- format to meet DW code style
- refactor method names to fix PSR1.Methods.CamelCapsMethodName.NotCamelCaps

- loader.php:
- add autoloader for plugin specific namespace classes

- action/editcommit.php:
- replace use of deprecated DW class definitions
by non deprecated class definitions
- followup code formatting of classes/*.php
- make use of auto loader loader.php

show more ...

Gha/maintenance (#84)

* GHA: Fix deprecation warning on ::set-output

* GHA: Replace deprecated actions for release creation

Moved paragraph 'Release Management' from README.md to workflows/docs/HowTo_MANAGE_RELEASES.md

#58

#58 - Initially adding release build artifacts

Added workflows/build_release.yml, workflows/resources/RELEASE_HEAD.md and CHANGELOG.md