chore(mise): remove 13 phantom tools and a no-op [alias] block

[hyperpolymath]

Context

mise.toml in this repo named 13 tools which do not exist in the mise registry, plus
an [alias] block that never did anything. The result was roughly 25 warning lines on
every shell entry.

Introduced across the estate by sweep2 on 2026-07-18: one file, copied to 427 repos, 419
carrying all 13 phantom names. This repo is one of 56 that actually committed the
broken file (most of the 419 copies exist only in uncommitted local working trees, not on
any remote).

Three faults

1. Thirteen names that do not resolve. Removed, grouped by reason:

reason	names
already provided by a listed tool	cargo (rust), gofmt (go), pip (python)
project deps, not system tools	vitest, jest, pytest, isort
base system binaries	git, gnu-sed, gnu-grep, gnu-tar
simply misnamed	denojs → deno

go-task is dropped, not renamed. The bare name task does not work either:
mise registry lists it as aqua:go-task/task, but task@latest still fails to resolve.
Worth recording — appearing in mise registry output is not sufficient to conclude a name
resolves; check with mise ls-remote. just is listed instead, matching the estate's
Justfile convention.

2. The [alias] block never ran. mise's [alias] maps an alias to a tool plugin;
it does not define tasks. build = "cargo build --release || npm run build || go build"
was therefore dead, and mise separately warns [alias] is deprecated in favour of
[tool_alias]. Not re-added as [tasks].

Verification

Controlled comparison on one machine, one shell:

warnings citing the FIXED file   : 0
errors  citing the FIXED file    : 0
warnings citing an UNFIXED copy  : 14

⚠️ A caveat worth passing on: an earlier version of this check reported "0 warnings"
purely because mise had refused to parse the file — Config files ... are not trusted.
An untrusted mise.toml is silently ignored, so absence of warnings is not evidence of
correctness unless the file is trusted first. The numbers above were taken after
mise trust.

Acceptance criteria

• Valid TOML
• Zero mise warnings/errors attributable to this file (post-mise trust)
• No [alias] section
• Reviewer confirms dropping go-task is acceptable (nothing in-repo invokes task)
• Reviewer adds this repo's actual language toolchain if mise.toml should be doing
  more than it currently does — this PR only removes what was broken

Note deliberately not actioned

Every tool is still pinned to latest, which is not reproducible and sits awkwardly beside
the estate's SHA-pinning doctrine. Changing that is a judgement call per repo, so it is
flagged here rather than made silently.

Model tier

Haiku/Sonnet — one config file, no code paths, mechanical once the registry facts are
established.