feat(min)!: re-parent session verbs under the session noun - #1008

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/concepts/loadouts.md`:
- Around line 166-169: Update the console examples in the loadouts
documentation, including both affected command blocks, to remove the `$` prompt
prefixes since they contain no output. Keep the commands themselves unchanged
and ensure the resulting Markdown passes the MD014 lint rule.

In `@docs/concepts/sessions.md`:
- Around line 67-69: Update the affected console examples in sessions.md,
including the block containing “min session activate --attach,” to remove $
prompt prefixes when no output is shown, or add representative output; ensure
all listed command blocks satisfy markdownlint-cli2 MD014.

In `@docs/guide/agents.md`:
- Around line 20-23: Update the shell command block in the agents guide to
resolve MD014 by removing the leading “$” prompts from both commands, or add
representative command output; preserve the existing commands and their
ordering.

In `@docs/guide/dev-shell.md`:
- Line 14: Remove the leading “$” prompts from the command-only shell fences in
dev-shell.md, including the command around “min session activate --attach .” and
the additionally referenced commands, while preserving them as shell commands
without adding output.

In `@docs/guide/setup.md`:
- Line 2: Update the guide description metadata to reference `min session
activate --attach .` instead of the non-attaching activation command, matching
the documented entry flow while preserving the existing setup summary.

In `@docs/reference/cli-min.md`:
- Line 58: Update the fenced command blocks in the CLI documentation at the
listed locations to specify a language, using shell for commands and console
where output is shown, so every newly added fence satisfies markdownlint MD040.

In `@docs/reference/cli.md`:
- Around line 29-33: Update the command examples in the “Command naming
convention” section to remove the undocumented “min completions install” example
or replace it with a documented noun/verb command, while preserving the
convention explanation and remaining valid examples.

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@docs/guide/agents.md`:
- Around line 25-27: Update the session command guidance near the `min session
attach -c` documentation to enumerate all supported non-interactive command
paths: `min run <task>`, `min package build [args...]`, `min check [args...]`,
and the internal `git-receive-pack min://` path. Replace the claim that only
`min run` is accepted while preserving the instruction to launch the agent from
an attached shell for interactive use.

In `@docs/reference/cli-min.md`:
- Around line 17-23: Update the command-convention section in the CLI reference
to explicitly list bare “min dirs”, “min bug”, “min version”, and “min
completions” as deliberate standalone exceptions, while preserving the existing
noun/verb convention and previously documented exceptions.