Add MCP support for general commands

[Hazel-Datastax]

What this PR does:

1. Basic MCP framework (support tools/list and tools/call)
2. Convert general commands to MCP tools

Which issue(s) this PR fixes:
Fixes NA

Checklist

• Changes manually tested
• Automated Tests added/updated
• Documentation added/updated
• CLA Signed: DataStax CLA

[github-actions]

📉 Unit Test Coverage Delta vs Main Branch

Metric	Value
Main Branch	50.29%
This PR	50.17%
Delta	🔴 -0.12%
⚠️ Coverage decreased

[github-actions]

Unit Test Coverage Report

Overall Project	50.17% -0.24%	🍏
Files changed	0%	❌

File	Coverage
RequestContext.java	16% -31.2%	❌
GeneralCommandTools.java	0%	❌
McpResource.java	0%	❌

[github-actions]

📉 Integration Test Coverage Delta vs Main Branch (dse69-it)

Metric	Value
Main Branch	70.78%
This PR	70.61%
Delta	🔴 -0.17%
⚠️ Coverage decreased

[github-actions]

Integration Test Coverage Report (dse69-it)

Overall Project	70.61% -0.24%	🍏
Files changed	0%	❌

File	Coverage
RequestContext.java	47.83% -30.83%	❌
GeneralCommandTools.java	0%	❌
McpResource.java	0% -96.55%	❌

[github-actions]

📉 Integration Test Coverage Delta vs Main Branch (hcd-it)

Metric	Value
Main Branch	72.54%
This PR	72.36%
Delta	🔴 -0.18%
⚠️ Coverage decreased

[github-actions]

Integration Test Coverage Report (hcd-it)

Overall Project	72.36% -0.24%	🍏
Files changed	0%	❌

File	Coverage
RequestContext.java	47.83% -30.83%	❌
GeneralCommandTools.java	0%	❌
McpResource.java	0% -96.55%	❌