restart: accept editflags to modify configuration before restarting

[itsme-ranger]

Fixes #4249

Changes

limactl restart now accepts all editflags (the same flags available on limactl edit), so you can atomically edit and restart an instance in one command:

# Change memory to 8 GiB and restart
limactl restart --memory=8 myinstance

# Change CPUs and restart forcibly
limactl restart --force --cpus=4 myinstance

# Use raw yq expression and restart
limactl restart --set '.ssh.localPort = 60023' myinstance

Implementation

When any editflag is provided, restartAction reads the current lima.yaml, applies the yq expressions, validates the result (same pipeline as limactl edit), and writes the updated config — all before stopping the instance. This ensures validation errors are caught before any disruptive stop. Then the normal stop+start flow runs via instance.Restart / instance.RestartForcibly.

If no editflags are provided, behavior is identical to before.

Testing

• go build ./cmd/limactl/ passes
• go test ./cmd/limactl/... passes
• golangci-lint run ./cmd/limactl/... reports 0 issues