fix(phpstan): update function parameter data types

See merge request !51

Added a condition to check if the class 'QUI\\ERP\\Money\\Price' exists before executing the rest
of the code in the convertWithSign.php file in the ajax directory. This fix prevents potential
errors and improves code stability.

Related: #9

This commit changes the data type of the function parameters across various files. The
modifications are made in the 'phpstan-baseline.neon', 'AbstractCurrency.php',
'CurrencyInterface.php', and 'Handler.php' files. Certain function parameters which could have been
null are now specifically marked as available for null input. Improving the type hinting of these
functions enhances code readability, allows for better static analysis and reduces the scope for
bugs in the future.

Related: #9

Add QUIQQER Tooling

See merge request !48

fix: log warning on missing default currency instead of error

See merge request !50

fix: log warning on missing default currency instead of error

See merge request !49

As the problem can be handled, it is not worth an error.

Next

See merge request !47

fix: quiqqer/quiqqer locale and paths adapted to quiqqer/core

See merge request !46

feat!: quiqqer v2

See merge request !45

feat!: quiqqer v2

See merge request !44

feat!: quiqqer v2

See merge request !43

BREAKING CHANGE: quiqqer v2 has been renamed to quiqqer/core. a new major version will be created here so that we can still develop for both versions.

Next

See merge request !42

fix: settings priority is no longer required

See merge request !41

Next

See merge request !40

fix: settings -> loading allowed currencies correctly

See merge request !39

Next

See merge request !38

fix: only use ~ at prices at non default currencies

See merge request !37

Next

See merge request !36

fix: formatter -> double precision

See merge request !35