feat(cli): rename localnet clean to remove, keep clean as alias

[zheli]

What

Makes remove the canonical name for the destructive LocalNet teardown command, with clean retained as a backward-compatible alias. dpm localnet remove and dpm localnet clean are equivalent; flags are unchanged (--name, --all, --force, --dry-run).

Why

remove names the action plainly and reads unambiguously next to the other lifecycle verbs (down, stop, remove), where "clean" could be mistaken for a non-destructive tidy-up. Keeping clean as an alias means existing scripts, CI pipelines, and muscle memory keep working with no breaking change.

Changes

• internal/cli/localnet/clean.go: Use: "remove", Aliases: ["clean"]; flag/help wording updated.
• internal/cli/help.go (+ help_test.go): --help advertises remove.
• internal/telemetry/allowlist.go: add remove to commandVerbs (telemetry records the canonical CommandPath() verb); clean kept so historical counters stay valid.
• internal/cli/cli_test.go: asserts both remove and the clean alias require a target.
• Skills docs (internal/skills/docs/{ci-localnet,localnet-lifecycle}.md): use remove — the skills-lint test resolves the canonical Name(), not aliases, so executable examples must use remove.
• Docs (localnet-lifecycle, observability, dashboard-customization), CI examples, down.go hint, Web UI copy, and design mockups: use remove (noting the clean alias where user-facing).
• docs/changes-from-proposal.md: records the clean → remove rename + the new alias (required by AGENTS.md proposal-deviation tracking).

Notes

• docs/tests/* left unchanged — historical test records, out of grant-facing scope and not linted.
• website/ guide pages are auto-generated from docs/ at build time (sync-docs), so no manual website edits are needed.

Verification

• make lint — 0 issues
• make test — all packages pass
• Manual: localnet --help lists remove; localnet remove --help shows Aliases: clean; localnet clean still dispatches.