Fix build failure on C++20

Fix build failure on C++20

Use =default for special methods

Fix 'type qualifiers ignored on function return type'

Suppress santize alignment warnings on 64-bit builds

Coding style

Coding style

Test new CI workflows

Fix tests

Use standard packing

Fix tests

Fix tests

Review and update documentation

OK, so pack all structures but Map and Vector *only* store pointers, …

Alignment...

+import

+import

+import

+import

+import

+import

Support 64-bit build

Fix IMPORT_FSTR_DATA

Support 64-bit build

Alignment can be multiple of 4

Review and update documentation

Review and update documentation

Review and update documentation

Templated != conflicts with ArduinoJson, be explicit