Renamed TopologyGraph to BRepGraph throughout, matching OCCTSwift v1.15.0. Closes #45.
OCCTSwift renamed TopologyGraph to BRepGraph (OCCTSwift#333) to match the C++ package it wraps, keeping a deprecated typealias so existing code compiled unchanged. This repo used the old name in its own public API (graph: TopologyGraph? = nil on the identity-table entry points, uids: [TopologyGraph.GraphUID?]? on FaceIdentityTable / EdgeIdentityTable / VertexIdentityTable), which surfaced as a deprecation warning on every build. Mechanical rename across Sources/, Tests/, and the current-state docs; no behaviour change, and source-compatible for callers since TopologyGraph and BRepGraph are the identical type via OCCTSwift's typealias.
Bumped to PATCH per the cohort SemVer policy: pure rename, no new API surface, no behaviour change.
Dep bump: OCCTSwift from: "1.12.9" → from: "1.15.0". Required for BRepGraph.
Full changelog: https://github.com/SecondMouseAU/OCCTSwiftTools/blob/main/docs/CHANGELOG.md