Update changelog for the upcoming v0.36.0

[evgenykochetkov]

Features and enhancements

• [core] Introduce records — an easy way to pack multiple data fields into a custom type and to serialize it to JSON. Check out the guide article for details (Implement record patches feature #2051)
• [c++] Introduce setImmediate API, that greatly optimises cases that require sheduling evaluation right after the current transaction completes (Introduce setImmediate API #2056)
• [ide] Add information about constant types in C++ cheatsheet in the sidebar (Add information about constants in C++ Cheatsheet (sidebar) #2045)

Bug fixes

• [nodes] Make xod graphics bitmaps compile on non-avr boards (fix(stdlib): make xod graphics bitmaps compile on non-avr boards #2053)
• [nodes] Fix xod-dev/esp8266-mcu/lan-ip implementation (Fix xod-dev/esp8266-mcu/lan-ip implementation #2050)

New nodes

• Add to-json abstract node and specialisations for primitive data types to xod/json library (Implement record patches feature #2051)

[brusherru]

#2051 also adds a to-json abstract node and some specializations for the primitive types. So you can add it into a section about new nodes 🤔