skills: take the corrected copies from the application repository

[A13xB0]

Mirror of .claude/skills/ in MeshBench/meshbench, refreshed from MeshBench/meshbench#429.

Both skills were read against the current tree and corrected. The largest changes:

• Refusals. A parameter the workbench cannot understand is now refused with a code from a closed set, rather than quietly replaced. Python raises a Refused subclass, Go returns a *Refused. The value-shaped no survives for state refusals such as sim.start, and that is still where scripts die.
• Terrain waits for consent, and a held warm does not hang: it ends the links job as failed and marks the session warmed, so a wait returns at once having measured nothing and every study runs over bare earth.
• Counts. Five verbs that answered with a number now return their rows. Four still do not, and they are named rather than the class being declared closed.
• Miss causes gained collision, receiver-busy and unclassified; floor stopped being the catch-all.
• The emulator toolchain is a download, so a board can be run on a machine that has none.
• Four commands the driving skill told an agent to run had never existed. They are replaced by the verbs and subcommands that do, and where a capability is genuinely unreachable from a script, the skill now says so.

The README gains a table of the directories five agents look in. Only the Claude Code row is exercised by MeshBench itself, which the README says rather than implying the rest were tested.

Mirroring is a manual copy that nothing generates and nothing checks. This tree had already drifted from the canonical one by a line before this change.

Companion documentation page: MeshBench/docs#27.