epic: extract CLI to dapi/memory-bank-cli and rename it to memory-bank-cli

[dapi]

Goal

Extract the Go CLI from tools/ into the standalone repository https://github.com/dapi/memory-bank-cli and rename the executable from memory-bank to memory-bank-cli.

Decision constraints

• memory-bank-lint is removed; no compatibility entrypoint or compatibility support is retained.
• The old memory-bank executable name is removed; the supported public command is memory-bank-cli only.
• The template repository remains the authoritative source of the memory-bank/ payload.
• The CLI repository owns releases, installation, command documentation, and CLI implementation.

Scope

• Move the Go module and its test suite from tools/ to dapi/memory-bank-cli, preserving history where practical.
• Change the module path and installation commands to github.com/dapi/memory-bank-cli/cmd/memory-bank-cli.
• Rename the primary command and all documentation/CI examples to memory-bank-cli lint, memory-bank-cli doctor, memory-bank-cli init, and memory-bank-cli update.
• Remove cmd/memory-bank-lint, its documentation, tests specific to compatibility, and all references to it.
• Do not ship aliases, wrapper binaries, or transition support for memory-bank or memory-bank-lint.
• Replace template-source auto-detection in doctor: it currently relies on tools/go.mod, which will no longer exist after extraction.
• Define an explicit template/CLI compatibility contract (schema and supported CLI version range).
• Update template CI to install a pinned released memory-bank-cli version and run lint/doctor against the template.
• Update adoption, usage, ownership, and development documentation.

Acceptance criteria

• go install github.com/dapi/memory-bank-cli/cmd/memory-bank-cli@vX.Y.Z installs the memory-bank-cli binary.
• memory-bank-cli lint, doctor, init, and update preserve their intended semantics, exit codes, and documented JSON contracts.
• Neither repository contains memory-bank-lint or documents a compatibility command.
• The template repository has no Go module or CLI source after migration.
• memory-bank-cli doctor --profile auto recognizes a template source repository without checking for tools/go.mod.
• Template CI validates the checked-out template with a pinned CLI release.
• Release and migration notes state that the executable rename is intentionally breaking.

Suggested delivery order

1. Define the compatibility marker/manifest and source-template detection.
2. Migrate the CLI into the new repository and establish its release pipeline.
3. Release the first memory-bank-cli version.
4. Switch template documentation and CI to the released CLI.
5. Remove tools/ and all compatibility artifacts from this repository.
6. Validate installation and adoption in a clean downstream fixture.

[dapi]

Work breakdown

CLI repository: https://github.com/dapi/memory-bank-cli

• feat: migrate CLI source and rename the executable to memory-bank-cli memory-bank-cli#1 — migrate source and rename executable to mb-cli.
• feat: make doctor template-profile detection independent of tools/go.mod memory-bank-cli#2 — replace doctor template-profile detection.
• build: establish memory-bank-cli releases and publish v1.0.0 memory-bank-cli#3 — establish releases and publish v1.0.0.
• migrate: retain the read-only memory-bank-cli doctor contract memory-bank-cli#4 — retain the mb-cli doctor contract (migrated from Добавить read-only команду memory-bank doctor для диагностики внедрения и drift #36).
• test: add downstream smoke tests and compatibility canaries memory-bank-cli#5 — downstream smoke tests and canaries (migrated from Добавить downstream smoke tests и canary совместимости шаблона #39).
• feat: add an opt-in GitHub workflow adapter memory-bank-cli#6 — opt-in GitHub adapter (migrated from Добавить опциональный GitHub adapter для issues, PR и delivery evidence #40).

Template repository:

• chore: switch the template repository to released memory-bank-cli and remove tools #52 — switch docs and CI to released mb-cli, then remove tools/. This starts after CLI v1.0.0 is released.

[dapi]

Core extraction is complete: the standalone https://github.com/dapi/memory-bank-cli repository is released as v1.0.0, and template migration/removal of tools was completed in #52. The remaining downstream smoke/canary work is tracked independently in dapi/memory-bank-cli#5 and does not block this migration Epic.