v0.13.5

Added

• (schema) Experiment annotating lenient deserialize opportunities (#1328)
• Stabilize additionalDirectories for sessions (#1327)
• (unstable) Remove unstable session model API (#1325)
• (unstable-v2) Remove dedicated session modes and models apis from v2 (#1324)
• (unstable) Add v2 enum extension RFD and fallbacks (#1304)

Other

• Move existing protocol docs to v1 (#1326)
• Add some draft v2 protocol docs and schema (#1306)