Fix outdated docs and shorten the README license section

[afarber]

Went through the docs and compared them with the code. A fair amount had drifted:

• The README and LIFECYCLE snippets called setZoom(14.0), which doesn't compile because the API takes a Float
• The Example11 README still used MapType.NORMAL, TERRAIN and CYCLE, which no longer exist, and talked about five map types and clearing the cache. It's rewritten for the 15 current types. The app itself pointed to a docs/API_KEYS.md that doesn't exist; it now points to MAP_TYPES.md
• MAP_TYPES said three types need an API key, but it's four. PUBLIC_API listed zoom as double
• PERFORMANCE showed decode options the code doesn't set, cache hit rates nobody measured, and a benchmarking snippet using internal cache methods
• The testing docs pinned versions that were already out of date (ktlint 1.3.1, robolectric 4.14). They now point to the version catalog. The instrumented test list was missing two of the four classes
• The workflow docs still described OSSRH/JIRA accounts and closing the staging repo by hand. Both were shut down in 2025, and publishing now goes through the Central Portal automatically. The release checklist now uses publish-release.sh

The README license section said "Apache 2.0" six times in different ways, and repeated the MIT line again under Features. It's now one short paragraph.