[agliznetsov]

Description of your changes

Adds two MCP tools, edit_domain and edit_community, following the edit_asset pattern: a single tool per resource type taking a typed list of operations. Each operation is validated and applied independently, and the result is success, partial_success or error.

• edit_domain: set_name, set_description, set_community, set_responsibility, remove_responsibility.
• edit_community: set_name, set_description, set_parent, set_responsibility, remove_responsibility. set_parent requires exactly one of parent or makeTopLevel: true.
• set_parent and set_community check the PATCH response rather than the HTTP status, so a silent no-op is reported as an error (see DEV-217539, where clearing a community's parent returns 200 without changing anything).
• Responsibilities use the existing /rest/2.0/responsibilities endpoints with resource type Domain / Community. The shared logic is in a new pkg/tools/responsibility package.
• Domains and communities can be given as a UUID or an exact name. Ambiguous names return the candidates.

Jira: DEV-217538

The tools are registered ungated next to edit_asset, which differs from §3.1 of docs/TOOL_CONTRIBUTION_STANDARDS.md (new write tools behind an experimental flag). Reviewers should decide whether to gate them together with the create tools from DEV-217560.

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Impact Analysis

• Adds new tools only; existing tools are unchanged apart from two registration lines in pkg/tools/register.go and a README update.
• Unit tests cover partial success, validation, ambiguous names, responsibility resource types and silent no-op detection. All tests and golangci-lint pass.
• Tested manually against a local instance: every operation was applied and checked. As expected, clearing a community's parent is reported as an error because the platform ignores the request (DEV-217539).

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Checklist

• I have performed a self-review of my code
• My code follows the contribution guidelines of this project
• My changes generate no new warnings

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