Support VECTOR data type

[bgrainger]

Related to #1549

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[Copilot]

PR Overview

This PR adds support for a new VECTOR data type in the connector, including the implementation of a dedicated column reader, updates to type mapping and parameter handling, and tests and pipeline adjustments.

• New VectorColumnReader implementation returning a float array from raw data
• Updated type mapping and parameter handling to correctly recognize and convert VECTOR data
• Integration tests and CI pipeline configuration updated to exercise and validate VECTOR behavior

Reviewed Changes

File	Description
src/MySqlConnector/ColumnReaders/VectorColumnReader.cs	Introduces a new column reader that converts binary data to a float array for VECTOR columns.
tests/IntegrationTests/DataTypes.cs	Adds test cases for VECTOR data and adjusts schema validation for VECTOR columns.
src/MySqlConnector/Core/SingleCommandPayloadCreator.cs	Adjusts parameter creation to treat VECTOR as LongBlob for MariaDB.
src/MySqlConnector/MySqlDbColumn.cs	Updates column size calculation for VECTOR types.
src/MySqlConnector/Core/TypeMapper.cs	Adds a new DbType mapping and column type metadata for VECTOR, including conversion from DbType to MySqlDbType.
src/MySqlConnector/MySqlParameter.cs	Extends SQL string and binary parameter handling to support float[] values for VECTOR.
src/MySqlConnector/MySqlDataReader.cs	Modifies output parameter conversion to accommodate the VECTOR type.
src/MySqlConnector/Protocol/ColumnType.cs	Adds the VECTOR enum value to the ColumnType declaration.
src/MySqlConnector/ColumnReaders/ColumnReader.cs	Dispatches VECTOR columns to the new VectorColumnReader.
src/MySqlConnector/MySqlDbType.cs	Extends the MySqlDbType enum with a VECTOR value.
azure-pipelines.yml	Updates unsupported features lists to include VECTOR where necessary.
docs/content/home.md	Revises compatibility information to reflect new MariaDB versions supporting VECTOR.
tests/IntegrationTests/CharacterSetTests.cs	Updates collation check to account for new MariaDB version naming.
src/MySqlConnector/Core/Row.cs	Adjusts binary data conversion rules to allow VECTOR type along with Geometry.

Copilot reviewed 24 out of 24 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

src/MySqlConnector/ColumnReaders/VectorColumnReader.cs:11

• Consider adding a validation check to ensure that the length of 'data' is a multiple of 4 bytes before performing the cast, to prevent potential runtime exceptions.

MemoryMarshal.Cast<byte, float>(data).ToArray();