Update doc about $db->select()

[Tigrov]

Merge it before release 2.0

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

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.62%. Comparing base (c3c896f) to head (92cbd5c).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #987   +/-   ##
=========================================
  Coverage     98.62%   98.62%           
  Complexity     1654     1654           
=========================================
  Files           120      120           
  Lines          4306     4306           
=========================================
  Hits           4247     4247           
  Misses           59       59           

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[Copilot]

Pull Request Overview

This PR updates tests and documentation to use the new $db->select() method instead of instantiating queries with new Query($db), and removes now-unnecessary use Yiisoft\Db\Query\Query imports.

• Replace all new Query($db) calls with $db->select().
• Remove redundant use Yiisoft\Db\Query\Query statements from tests.
• Update code examples in docs and README to match the new API.

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/Db/Query/QueryTest.php	Switched query instantiation to $db->select()
tests/Db/Expression/StructuredExpressionBuilderTest.php	Updated expression builder test to use $db->select()
tests/Db/Expression/JsonExpressionBuilderTest.php	Updated expression builder test to use $db->select()
tests/Db/Expression/ArrayExpressionBuilderTest.php	Updated expression builder test to use $db->select()
tests/Common/CommonCommandTest.php	Replaced new Query($db) with $db->select() in assertions
tests/AbstractConnectionTest.php	Updated batch query result creation to use $db->select()
src/Query/QueryInterface.php	Updated doc example to use $db->select()
docs/guide/pt-BR/query/with-query.md	Changed example to use $db->select()
docs/guide/pt-BR/query/where.md	Changed example to use $db->select()
docs/guide/pt-BR/query/union.md	Changed example to use $db->select()
docs/guide/pt-BR/query/select.md	Changed example to use $db->select()
docs/guide/pt-BR/query-builder.md	Changed example to use $db->select()
docs/guide/en/schema/typecasting.md	Changed example to use $db->select()
docs/guide/en/query/with-query.md	Changed example to use $db->select()
docs/guide/en/query/where.md	Changed example to use $db->select()
docs/guide/en/query/union.md	Changed example to use $db->select()
docs/guide/en/query/select.md	Changed example to use $db->select()
docs/guide/en/query-builder.md	Changed example to use $db->select()
README.md	Updated sample usage to use $db->select()

[samdark]

@Tigrov time to update/merge it?

[Tigrov]

Before release 2.0
It changes doc and it will not be valid for the current stable version.