Harden Files input method against executable file uploads

[cyrez]

Pull Request in relation with PR https://github.com/joomla-framework/filesystem/pull/81/changes

Summary of Changes

This PR returns the "old" hardening behavior of the CMS Input Files get method

Testing Instructions

Code review, compare with original code of the CMS package (libraries/src/Input/Files.php > libraries/vendor/joomla/input/src/Files.php)

[cyrez]

Update PR with correct namespace for isSafeFile (i was using CMS instead of framework namespace).

Replaced Joomla/Filter/InputFilter by Joomla/Filesystem/File

[heelc29]

The filesystem package is not available

input/composer.json

Lines 8 to 19 in b4ef792

	"require": {
	"php": "^8.1.0",
	"joomla/filter": "^3.0",
	"symfony/deprecation-contracts": "^2|^3"
	},
	"require-dev": {
	"joomla/test": "^3.0",
	"phpunit/phpunit": "^9.5.28",
	"squizlabs/php_codesniffer": "^3.7.2",
	"phpstan/phpstan": "1.12.27",
	"phpstan/phpstan-deprecation-rules": "1.2.1"
	},

[cyrez]

The filesystem package is not available

input/composer.json

Lines 8 to 19 in b4ef792

	"require": {
	"php": "^8.1.0",
	"joomla/filter": "^3.0",
	"symfony/deprecation-contracts": "^2|^3"
	},
	"require-dev": {
	"joomla/test": "^3.0",
	"phpunit/phpunit": "^9.5.28",
	"squizlabs/php_codesniffer": "^3.7.2",
	"phpstan/phpstan": "1.12.27",
	"phpstan/phpstan-deprecation-rules": "1.2.1"
	},

Oh yes, you're right!

So, i will wait for a maintainer to check if better to include Filesystem or to add isSafeFile to the inputFilter.
I think @Hackwar you are the person i'm looking for? :-)