v0.9.0-rc2

SAIL: Add CodeQL workflow for GitHub code scanning
BINDINGS/C++: Add missing sail_variant forward declaration
BINDINGS/C++: Include missing common.h for SailCompression
BINDINGS/C++: Include missing common.h for SailPixelFormat
BINDINGS/C++: Include missing compression_level-c++.h for sail::compression_level
BINDINGS/C++: Include missing cstddef
BINDINGS/C++: Include missing includes
BINDINGS/C++: Include missing manip_common.h for manip options
BINDINGS/C++: Include missing stddef
COMMON: Added floating point pixel formats
COMMON: Include missing includes
COMMON: Include missing stddef
DOC: Remove LGTM badge
DOC: Update description
LIBSAIL: Include missing includes
LIBSAIL: Include missing stddef
PNG: Use snprintf()
SAIL: Added missing return
SAIL: Remove LGTM config
SAIL: Update Linux distro to 22.04 in Travis
SAIL: Update comments
SAIL: Update links to git
SAIL: Update macOS to 12.6 in Travis config
SAIL: Use <> brackets in CMake test
SAIL: Use Windows.h with _WIN32_WINNT=0x0600