Add Swift rewrite with SwiftUI support

Major modernization of JMStaticContentTableViewController:

- Add Swift Package Manager support (iOS 15+, macOS 12+, tvOS 15+)
- Implement modern Swift API with closures
- Add SwiftUI JMStaticContentList component
- Add built-in cell types: text, toggle, value
- Add comprehensive test suite (25 tests)
- Fix issue #4: removeAllSections now properly syncs with tableView
- Update README with Swift/SwiftUI examples and migration guide
- Maintain backward compatibility with Objective-C code

Merge pull request #12 from cdzombak/cdz/update-podspec

Bump podspec to v0.3.1

Merge pull request #9 from paulz/master

Fix highlighting when selecting a cell

Bump version with latest changes. Update Version in .podspec

Fixing .podspec

Tidying up README

Initial commit.