Remove deprecations from 1.0.0

[chemicL]

Summary

This PR removes all deprecated APIs and classes in preparation for the 1.0.0 release of the Java MCP SDK. The changes focus on cleaning up the codebase by eliminating deprecated methods, constructors, and entire modules that are no longer needed.

Key Changes

Removed Deprecated Modules

• Jackson JSON Schema Validator - Removed entire mcp-json-jackson module including:
• JacksonMcpJsonMapper and JacksonMcpJsonMapperSupplier
• DefaultJsonSchemaValidator and JacksonJsonSchemaValidatorSupplier
• All associated tests (~809 lines of test code removed)

Removed Deprecated APIs

Server APIs

• McpServerSession - Removed deprecated session interface (85 lines)
• McpAsyncServer.loggingNotification() - Removed method that incorrectly broadcasted to all clients; use McpAsyncServerExchange.loggingNotification() instead
• McpAsyncServerExchange deprecated constructor - Removed constructor without transport context support
• McpSyncServer deprecated methods - Removed 15 lines of deprecated functionality

Client APIs

• McpClientSession - Removed deprecated session interface methods (15 lines)
• HttpClientSseClientTransport.Builder(String) - Removed deprecated constructor

Schema/Core APIs

• McpSchema - Removed 145 lines of deprecated schema definitions
• McpError deprecated constructor - Removed 5 lines

Improved Error Handling

• Replaced generic McpError exceptions with more appropriate exception types:
• IllegalStateException for client initialization/configuration errors
• IllegalArgumentException for invalid parameter errors
• Proper McpError with error codes (e.g., METHOD_NOT_FOUND) for protocol-level errors

API Modernization

• Tool specification constructors - Removed deprecated call parameter; now only callHandler is supported
• Content constructors - Simplified constructors for ImageContent, EmbeddedResource, removing unused annotation parameters
• Resource builders - Updated to use builder pattern instead of constructors throughout tests

Test Coverage

All tests have been updated to use non-deprecated APIs and continue to pass, ensuring backward compatibility for the migration path while removing the deprecated code paths.

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This PR creates a cleaner, more maintainable codebase for the 1.0.0 release by removing legacy APIs that were marked for removal.

[tzolov]

LGTM, nice cleaning @chemicL