Add support for commitment coverage in CCM

[sandyydk]

This pull request introduces a new feature for fetching commitment coverage information in the Harness Cloud Cost Management (CCM) toolset. The changes include updates to the API, data structures, and tool registration to support this functionality.

New Feature: Commitment Coverage Retrieval

• Added API Endpoint and Constants:

  • Introduced ccmCommitmentBasePath and ccmCommitmentCoverageDetailsPath constants for the new API endpoint to fetch commitment coverage details. (client/cloudcostmanagement.go)

• New Method in CloudCostManagementService:

  • Implemented GetComputeCoverage method to handle API requests for commitment coverage, including default date handling and optional parameters like service and cloud account IDs. (client/cloudcostmanagement.go)

Data Structure Enhancements

• Added DTOs for Commitment Coverage:
  • Introduced CCMCommitmentOptions, CCMCommitmentBaseResponse, and CCMCommitmentAPIFilter structs to represent request and response data for the new feature. (client/dto/cloudcostmanagement.go) [1] [2]

Tool Registration and Documentation

• New Tool for Commitment Coverage:

  • Added FetchCommitmentCoverageTool to define and handle the new CLI tool for fetching commitment coverage, including parameter validation and response formatting. (pkg/harness/cloudcostmanagement.go)

• Registered the Tool:

  • Registered FetchCommitmentCoverageTool in the registerCloudCostManagement function to make it available in the toolset. (pkg/harness/tools.go)

• Documentation Update:

  • Updated the README.md to include the new get_commitment_coverage command in the list of available tools. (README.md)

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