Add Tools Annotation

[zmofei]

This pull request introduces a new annotation system for all tools in the MCP server, standardizes tool structure via a new BaseTool abstract class, and ensures that all tools expose consistent metadata. It also adds comprehensive tests to verify the presence and correctness of these annotations. These changes improve the extensibility, maintainability, and introspection of the tool system.

Tool architecture and annotation improvements:

• Introduced a new abstract class BaseTool in src/tools/BaseTool.ts that standardizes tool structure and enforces the presence of annotations and related metadata on all tools. This includes a unified installTo method and logging helper.
• Refactored MapboxApiBasedTool and all tool classes (e.g., CategoryListTool, CategorySearchTool, DirectionsTool, IsochroneTool, MatrixTool, ReverseGeocodeTool, SearchAndGeocodeTool, StaticMapImageTool, VersionTool) to extend from BaseTool, and added a required annotations property to each, specifying title, readOnlyHint, destructiveHint, idempotentHint, and openWorldHint. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

Testing and validation:

• Added a new test suite test/tools/annotations.test.ts to ensure all tools have the required annotations, can be installed to the server, and that annotation values (such as readOnlyHint and openWorldHint) are correct for each tool type.

Build and package updates:

• Added a new script dev:inspect to package.json for easier development and inspection of the MCP server.
• Bumped the package version from 0.5.1 to 0.5.2 to reflect these changes.

Other minor changes:

• Cleaned up and removed now-unnecessary code from tool classes, such as redundant logging and installation methods, as these are now handled by BaseTool. [1] [2]
• Updated server instantiation in src/index.ts to remove unused capabilities.

[alexisraykhel]

looks good! :) I like how you unified some functionality, too.