Function planWrites

planWrites(
writes: readonly RegisterWrite[],
options?: PlanWritesOptions,
): readonly WritePlanStep[]
Packs register writes into the fewest transactions that cover them.

The planner sorts by address, groups contiguous addresses into runs, splits each run at maxRegistersPerWrite, and emits FC16 for a run of at least minRunLength registers or FC06 for anything shorter.

When the same address appears more than once, the last write wins. This matches a caller that supersedes a pending value rather than queueing behind it, and it is the only rule under which the plan is order-independent for distinct addresses.
Parameters
- writes: readonly RegisterWrite[]
  Requested writes, in any order.
- options: PlanWritesOptions = {}
  Device limits and the FC06/FC16 preference.
Returns readonly WritePlanStep[]
Transactions to issue, in ascending address order.
Throws
RangeError - An address, a value, or an option is out of range.
Example
```
// 2000..2003 contiguous, 2010 alone
planWrites([
  { address: 2003, value: 40 },
  { address: 2000, value: 10 },
  { address: 2010, value: 99 },
  { address: 2001, value: 20 },
  { address: 2002, value: 30 },
]);
// [
//   { kind: 'multiple', address: 2000, values: Uint16Array [10, 20, 30, 40] },
//   { kind: 'single', address: 2010, value: 99 },
// ]
```
- Defined in src/register-plan.ts:231