One-click installer for useful tooling

[dereuromark]

in the backend we should provide a one-click installer for certain useful tools to opt-in

They auto detect the paths and adjust the script before creating it for the user.
Also:

• Allow visual diff of latest version vs status quo in app to quickly compare and see what might want to get ported/updated
• Provide base stubs to work with in case one doesnt need to copy things over

PHPStan enhancements

includes:
	- phpstan-baseline.neon
	- vendor/cakedc/cakephp-phpstan/extension.neon
	- vendor/rector/type-perfect/config/extension.neon
	- vendor/phpstan/phpstan-strict-rules/rules.neon

composer unused-vars

"sirbrillig/phpcs-variable-analysis"

"unused-vars": "phpcs --standard=phpcs-unused-vars.xml --colors -p src/",
and

<?xml version="1.0"?>
<ruleset name="UnusedVariables">
    <description>Detect unused variables excluding function parameters</description>
    <arg name="tab-width" value="4"/>
    <arg value="ps"/>

    <rule ref="VariableAnalysis.CodeAnalysis.VariableAnalysis">
        <properties>
            <property name="allowUnusedFunctionParameters" value="1"/>
            <property name="allowUnusedForeachVariables" value="1"/>
            <property name="ignoreUnusedRegexp" value="/^_/"/>
        </properties>
    </rule>
</ruleset>

[dereuromark]

My vision would be sth similar as Setup plugins https://github.com/dereuromark/cakephp-setup/blob/master/docs/Healthcheck/Healthcheck.md

We have a dashboard with all the checks and we can see if we already have support for certain tooling / best practices:

• PHPStan level (8+ ideally as green, anything below as yellow, < 1 red)
• phpstan extensions
• phpcs
• unused vars phpcs
• cs modified (sh file to only run cs on modified files) - composer script "cs-modified": "sh cs-modified.sh"
• ...

Whatever is missing can be "installed" with 1 click - or given instructions if needed.