docs(plan): record v0.1.1, and the two decisions open before v0.2

[TMHSDigital]

PLAN.md still said v0.1.0 is tagged and released, and that CI covers Ubuntu and Windows on Python 3.12 and 3.13.

It now records:

• v0.1.1 as the review release: all 43 review issues fixed, the local arm run for real, and the first release with attested distributions.
• The current CI coverage.
• That Run the local arm for real: local_logits and generative have never left the test suite #3's local half is done and its generative half needs a paid run.
• The two decisions to settle before v0.2 builds on the local arm: multi-token option scoring (raised on Run the local arm for real: local_logits and generative have never left the test suite #3), and whether MCE stays in the report (Finding: MCE cannot detect gross overconfidence at 500 rows, and whether to keep it is open #7).

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