Many updates and fixes

#1257 Fix year_month arithmetic and correct chrono API behavior
#1259 Suppress warnings from std in optimized builds
#1261 Fix incorrect namespace for iter_swap calls
#1262 Document how to implement platform specifics
#1264 Add template deduction guide for span from vector
#1265 Fix etl::tuple template signature error in pair assignment operator
#1266 Fix etl::as_bytes for etl::span
#1267 Update C++26 deprecated constructs to ensure future standard compliance
#1268 Remove some UB in test_vector_non_trivial.cpp
#1269 Deduce underlying storage size when constructing string_ext from char[].
#1271 Fix return value of get_token_list
#1275 Add etl::type_list API to more classes.
#1277 Fix for issue 1276 "Data corruption in the etl::bip_buffer_spsc_atomic"
#1281 Remove advance() on static spans
#1285 Manchester coding
#1286 Add missing includes
#1287 Move comparison operators of etl::expected to namespace etl
#1288 Add basic_format_arg constructor for ibasic_string
#1290 Add support for size_t and unsigned long to etl::format
#1291 Make typed_storage constructor constexpr
#1292 Add ref-qualifiers to basic_format_spec
#1299 Fix link rotations for etl::tree_node
#1303 Add constexpr to array comparison operators
#1304 Fix etl::variant get() for ambiguous types
#1307 Add more features to etl::type_list
#1308 Fix comparison and swap operators not in etl namespace
#1309 Reduce string flash usage
#1312 Enforce worse-case O(log n) dispatch for messages when using message router for c++11 and up
#1315 Add get endianness to byte stream reader