Update psalm types

[Tigrov]

Q	A
Is bugfix?	❌
New feature?	❌
Breaks BC?	❌
Fixed issues	-

[what-the-diff]

PR Summary

• Annotations Improved for Array Types
  The team added and updated type annotations—a way of clarifying the kind of data we're dealing with—for various arrays in the 'Schema.php' file.

• Normalization of Key Case for Arrays
  Some methods have been updated to ensure that the 'key case' of arrays—basically, how their identifiers are formatted—is consistent. This helps keep our code neat and readable.

• Updated Nullable Property
  In certain methods, we've modified a property to be 'nullable', which means it can accept the absence of a value. This offers more flexibility to our code.

• Renaming and Annotation Updates for Variables
  Various variables in multiple methods were renamed to better reflect their purpose and improve the understanding, also their type annotations were updated. For instance, $foreignKeysList is now $foreignKeys which is a simpler and more intuitive name.

• Unused Variables Removed
  Unused variables can lead to confusion and are best removed if they are not serving their purpose. The team eliminated some such variables in the 'getPragmaIndexInfo()' method which makes our code more efficient and straightforward.

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (b172ec9) 98.21% compared to head (30f38a7) 98.21%.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #267   +/-   ##
=========================================
  Coverage     98.21%   98.21%           
  Complexity      325      325           
=========================================
  Files            17       17           
  Lines          1006     1006           
=========================================
  Hits            988      988           
  Misses           18       18           

Files Changed	Coverage Δ
src/Schema.php	100.00% <ø> (ø)

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[vjik]

@Tigrov A new psalm error has appeared:

Error: src/Schema.php:388:71: PossiblyNullArgument: Argument 3 of Yiisoft\Db\Schema\TableSchemaInterface::compositeForeignKey cannot be null, possibly null value provided

Can you fix it?