Fix Bases view settings compatibility (#2382)

[callumalpass]

Summary

Related to #2382, reported by @techwiththiru.

TaskNotes previously generated custom Bases view settings under options: or config:, while Kanban read only direct view keys. This left settings such as hideEmptyColumns and pinnedColumns unread.

• Read direct settings first, then legacy config: and options: values, preserving explicit false, zero, and empty values.
• Support legacy settings across TaskNotes views without rewriting existing .base files; retain Calendar's existing options: support.
• Reflect legacy values in the native settings-panel defaults.
• Generate flat settings in default Kanban, Calendar, and Agenda files and v3 saved-view exports.
• Correct documentation examples and add unit and isolated native Obsidian regression coverage.

Validation

Passed locally:

• Full Jest suite: 4,620 passed, 1,013 skipped, 4 todo.
• Strict lint (including review-types, CSS, and architecture checks).
• TypeScript typecheck.
• Production build.
• Bundle budget: 4,544,771 bytes, below 5,000,000 bytes.
• Documentation source checks and git diff --check.

Native test limitation

The isolated Obsidian E2E run was blocked in beforeAll by a DevTools startup timeout. None of the eight native scenarios reached their assertions. Live-app verification remains incomplete; this PR does not claim those tests passed.

The issue is intentionally not automatically closed by this PR.