…, terminal) (#1260)

* fix(cli): align utils/ miscellaneous error messages with 4-ingredient strategy

Final PR in the error-message series. Covers everything not already
touched by #1255-#1259: utils/basics, utils/config, utils/fs,
utils/git, utils/npm, utils/promise, utils/terminal, and the flags
module at the root of the CLI tree.

Sources:
- flags.mts: 2 throws (--max-old-space-size, --max-semi-space-size)
  — name the flag, show the offending value, suggest a concrete
  megabyte value.
- utils/config.mts: 1 throw (SOCKET_CLI_CONFIG base64 decode) —
  explains the replacement-character symptom and how to re-encode.
- utils/basics/vfs-extract.mts: 4 throws (SEA VFS extraction for
  Python + security tools) — name the missing paths, the exit
  codes, and point at the "rebuild the SEA binary" fix.
- utils/promise/queue.mts: 1 throw (PromiseQueue concurrency guard)
  — show the offending value and suggest 4/8.
- utils/npm/spec.mts: 1 throw (PURL conversion) — show the input,
  state what a valid npm spec looks like.
- utils/git/operations.mts: 1 throw (git-not-on-PATH) — point at
  install and the local-path env-var override.
- utils/git/gitlab-provider.mts: 2 throws (no token, PR creation
  after retries) — name the token scope, the retry count, the
  repo/head refs.
- utils/fs/path-resolve.mts: 1 throw (npm path-walk iteration cap)
  — name the start path, current directory, and what usually
  causes the cycle (symlinks).
- utils/terminal/iocraft.mts: 1 throw (native-module load failure)
  — show the underlying error and the offending platform/arch
  triple.

Skipped (already informative):
- github-provider.mts pass-through errors (forward inner CResult
  cause/message)
- gitlab-provider.mts try/catch wrappers that call
  formatErrorWithDetail (inner error has context)
- 'process.exit called' sentinel throws in npm/pnpm/yarn/with-
  subcommands paths (test harness re-raise markers, not user-facing)

Tests updated:
- test/unit/utils/promise/queue.test.mts (2 assertions)
- test/unit/utils/npm/spec.test.mts (2 assertions)
- test/unit/utils/git/gitlab-provider.test.mts (3 assertions)

Full suite (343 files / 5225 tests) passes.

Completes the series: #1255 (commands/) → #1256 (utils/dlx/) →
#1257 (utils/update + utils/command/) → #1258 (env/ + constants/) →
#1259 (test/) → this.

* fix(cli): address Cursor bugbot findings on error messages

Four issues flagged by Cursor bugbot on #1260:

1. (Medium) gitlab-provider.mts: error said 'check GL_TOKEN permissions'
   but the actual env var is GITLAB_TOKEN (as the same file's getGitLabToken
   confirms). Fixed to GITLAB_TOKEN.

2. (Medium) git/operations.mts: error suggested 'set SOCKET_CLI_GIT_PATH
   to point at a specific binary' — that env var is not read anywhere.
   Removed the false suggestion; kept the real fix (install git and put
   it on PATH) with package-manager examples.

3. (Low) terminal/iocraft.mts: '(e as Error).message' evaluates to
   undefined when a non-Error is thrown. Switched to
   'e instanceof Error ? e.message : String(e)' for safe stringification.

4. (Low) gitlab-provider.mts: error said 'after ${retries} retries' but
   the loop runs attempt 1..retries inclusive — retries is the total
   attempt count, not retries beyond the first. Reworded to 'attempts'.
   Matching test assertions updated.

Caught by #1260 bugbot review.

* chore(cli): use joinAnd + getErrorCause helpers in utils/ misc

- basics/vfs-extract.mts: missingTools list now renders as prose
  via joinAnd('a, b, and c').
- terminal/iocraft.mts: inline `e instanceof Error ? e.message :
  String(e)` swapped for getErrorCause(e). require() of a native
  binding can throw non-Error values, so the safe-stringify with
  UNKNOWN_ERROR fallback is correct here.

No behavior change for Error throws.