Add Migrations 5.0 rector rules for PHINX_TYPE_* constant renaming

Summary

This PR adds rector rules to automatically upgrade migrations from the deprecated PHINX_TYPE_* constants to the new TYPE_* constants introduced in Migrations 5.0.

Changes

• ✅ Add config/rector/migrations50.php entry point
• ✅ Add config/rector/sets/migrations50.php with constant rename rules
• ✅ Update CakePHPSetList with MIGRATIONS_50 constant
• ✅ Update README.md with migrations50 documentation

Usage

Users can now upgrade their migrations using:

cd /path/to/upgrade
bin/cake upgrade rector --rules migrations50 /path/to/your/app/config

Details

The rules rename all deprecated PHINX_TYPE_* constants to their new TYPE_* equivalents, matching the naming conventions of Cake\Database\Schema\TableSchemaInterface:

Standard Types

• PHINX_TYPE_STRING → TYPE_STRING
• PHINX_TYPE_INTEGER → TYPE_INTEGER
• PHINX_TYPE_BOOLEAN → TYPE_BOOLEAN
• etc.

Multi-word Types (no underscores)

• PHINX_TYPE_TINY_INTEGER → TYPE_TINYINTEGER
• PHINX_TYPE_SMALL_INTEGER → TYPE_SMALLINTEGER
• PHINX_TYPE_BIG_INTEGER → TYPE_BIGINTEGER

UUID Types (with underscores)

• PHINX_TYPE_BINARYUUID → TYPE_BINARY_UUID
• PHINX_TYPE_NATIVEUUID → TYPE_NATIVE_UUID

Geospatial Types

• PHINX_TYPE_GEOMETRY → TYPE_GEOMETRY
• PHINX_TYPE_POINT → TYPE_POINT
• PHINX_TYPE_LINESTRING → TYPE_LINESTRING
• PHINX_TYPE_POLYGON → TYPE_POLYGON
• PHINX_TYPES_GEOSPATIAL → TYPES_GEOSPATIAL

Database-specific Types

• PHINX_TYPE_YEAR → TYPE_YEAR (MySQL)
• PHINX_TYPE_CIDR → TYPE_CIDR (PostgreSQL)
• PHINX_TYPE_INET → TYPE_INET (PostgreSQL)
• PHINX_TYPE_MACADDR → TYPE_MACADDR (PostgreSQL)
• PHINX_TYPE_INTERVAL → TYPE_INTERVAL (PostgreSQL)

Related Issue

cakephp/migrations#948

Testing

The rector rules can be tested by running them against migration files that use the old constants. Example:

Before:

$table->addColumn('name', AdapterInterface::PHINX_TYPE_STRING)
    ->addColumn('count', AdapterInterface::PHINX_TYPE_INTEGER)
    ->save();

After:

$table->addColumn('name', AdapterInterface::TYPE_STRING)
    ->addColumn('count', AdapterInterface::TYPE_INTEGER)
    ->save();