Embedded Template Library (ETL) Files

[#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<const T> [#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