feat: add tag and tag group reads

[AlexanderNZ]

I needed tags in MCP, so I wired up the read endpoints and made sure it covers issue #10.

What I changed

• added list/get tag reads for /landscapes/{landscapeId}/versions/{versionId}/tags
• added list/get tag group reads
• added lightweight formatting for tag/tag group output

Why I did it

• tag IDs show up in model objects, but without a read tool they’re hard to use
• this closes the gap called out in Feature request: include getTags in MCP #10

Notes

• depends on the refactor in PR refactor: remove teams support and harden tests #23

Test plan

• not run

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Note

Medium Risk
Adds new IcePanel API client capabilities (including retries/timeouts and multiple write endpoints) and exposes new MCP tools for tag management; incorrect request/typing or retry behavior could cause failed calls or unintended mutations.

Overview
Adds a new icepanel-client service with validated base URL configuration, request timeouts, GET retry/backoff, and a richer IcePanelApiError/handleApiError flow, plus new endpoints for tags/tag groups and several create/update/delete operations (model objects, connections, tags, domains).

Introduces src/tools/tags.ts registering MCP tools for icepanel_list_tags, icepanel_get_tag, icepanel_list_tag_groups, and icepanel_get_tag_group (with optional fuzzy search, pagination, and markdown/json output), and also adds tag write tools (icepanel_create_tag, icepanel_update_tag, icepanel_delete_tag).

Updates src/types.ts to broaden model object status/type unions and add request/response types for write operations and tag/tag-group/domain entities, while removing the Team/TeamsResponse types.

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Recommended merge order

• PR refactor: reduce filter param duplication #19 (filter refactor)
• PR feat: add HTTP transport (Streamable HTTP) #20 (HTTP transport)
• PR feat: add Docker support #21 (Docker support)
• PR feat: add IcePanel write tools #22 (write tools)
• PR refactor: remove teams support and harden tests #23 (refactor + tests)
• PR feat: add tag and tag group reads #24 (tags + tag groups)
• PR feat: add domain reads #25 (domains)
• PR feat: add connection reads #26 (connections)
• PR feat: add diagram reads #27 (diagrams)
• PR feat: add flow reads #28 (flows)
• PR feat: add model object export reads #29 (model object exports)
• PR docs: expand read tools and tests #30 (docs + tests)