Add Kiro to databricks aitools install

[antonyprasad-db]

Summary

Adds Kiro to the agent registry so databricks aitools install treats it like any other skills-only agent. Follows the same shape as Goose (#6214), Gemini CLI (#6204) and Pi (#6199).

Why

Kiro reads agent skills from ~/.kiro/skills (user-level) and <workspace>/.kiro/skills (workspace-level), each skill a directory containing SKILL.md — exactly the layout this repo already emits. Today Kiro users have to fall back to databricks aitools install --path ~/.kiro/skills, which works but records no state, so aitools update and aitools uninstall never see those skills and aitools list reports every one of them as not installed.

Verification

Tested on macOS with Kiro 1.0.182.

Kiro's loader (NodeProgressiveContextSource) rejects a skill when frontmatter is missing, when name or description is empty, when name is outside 1–64 characters, when description exceeds 1024, or when name does not equal the directory name. Everything this repo emits satisfies that.

With 29 stable skills installed into ~/.kiro/skills, Kiro accepted all 29. The only rejections in that directory were two deliberately malformed probe skills added to confirm the loader was really scanning, plus two unrelated pre-existing skills whose frontmatter name disagrees with their directory:

skill.frontmatter.missing   zz-probe-no-frontmatter      (deliberate probe)
skill.fields.missing        zz-probe-no-description      (deliberate probe)
skill.name.mismatch         analyze-mlflow-trace         (pre-existing, unrelated)
skill.name.mismatch         analyze-mlflow-chat-session  (pre-existing, unrelated)

Worth knowing for anyone testing this: Kiro resolves skills lazily when a chat session starts, not when the IDE launches. Installing and then looking at an already-open Kiro shows nothing until a new session begins.

Notes on the registry entry

• SkillsSubdir is left empty because Kiro's directory is literally skills, so the default applies.
• SupportsProjectScope: true — Kiro's own picker text documents both scopes.
• Binary: "kiro" is set, but Kiro is IDE-first so the binary is frequently absent from PATH. Detection then falls back to ConfigDir and reports files-only, which is the correct state for a skills-only agent (Plugin nil).

Telemetry

Also adds AitoolsAgentTypeKiro and the matching agentType case, so Kiro installs are not logged as TYPE_UNSPECIFIED and TestAgentTypeCoversRegistry stays green.

One thing a maintainer will need to do: that guard's failure message notes the enum lives in enum.proto (Universe) as well as aitools_install.go (CLI). Only the CLI half is in this PR, since the Universe proto isn't in this repo. Happy to follow whatever process you prefer for the proto side.

Tests

go test ./cmd/aitools/... ./libs/aitools/... ./libs/telemetry/...

ok  github.com/databricks/cli/cmd/aitools              2.027s
ok  github.com/databricks/cli/libs/aitools/agents
ok  github.com/databricks/cli/libs/aitools/installer
ok  github.com/databricks/cli/libs/telemetry           4.959s
ok  github.com/databricks/cli/libs/telemetry/protos    0.826s

Test coverage added alongside the existing Goose cases: registry paths and project detection in libs/aitools/agents/registry_test.go, the skills-only assertion in agents_test.go, and the project-scope declaration in libs/aitools/installer/installer_test.go.

[github-actions]

Approval status: pending

/cmd/aitools/ - needs approval

Files: cmd/aitools/telemetry.go
Suggested: @lennartkats-db
Also eligible: @simonfaltum, @parthban-db, @fjakobs, @Shridhad, @atilafassina, @keugenek, @igrekun, @pkosiec, @MarioCadenas, @pffigueiredo, @ditadi, @calvarjorge, @renaudhartert-db, @hectorcast-db, @tanmay-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/aitools/ - needs approval

4 files changed
Suggested: @lennartkats-db
Also eligible: @simonfaltum, @parthban-db, @fjakobs, @Shridhad, @atilafassina, @keugenek, @igrekun, @pkosiec, @MarioCadenas, @pffigueiredo, @ditadi, @calvarjorge, @renaudhartert-db, @hectorcast-db, @tanmay-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

/libs/telemetry/ - needs approval

Files: libs/telemetry/protos/aitools_install.go
Suggested: @simonfaltum
Also eligible: @parthban-db, @renaudhartert-db, @hectorcast-db, @tanmay-db, @Divyansh-db, @tejaskochar-db, @mihaimitrea-db, @chrisst, @rauchy

_{Any maintainer (@andrewnester, @anton-107, @denik, @pietern, @shreyas-goenka, @simonfaltum, @renaudhartert-db, @janniklasrose, @lennartkats-db, @rugpanov, @rclarey) can approve all areas.
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