new serialization API

[milyin]

Describe the release item

There are few problems with current serialization API / format:

• lack of performance on serializing/deserializing arrays of primitive types
• very tight relation between serializer and ZBytes type. It was supposed that serializer should be replaceable, but actually current serializer is nailed to ZBytes and we would have been obliged to support it forever, even knowing that it's suboptimal
• asymmetry: automatic serialization on write but explicit deserialization call on read

The new serialization API solves this:

• it supports writing sequences of elements without prefixing each element with it's size, significantly improving performance
• it is palced to zenoh-ext and explicitly calls ZBytes's writer/reader, without integration to ZBytes
• there is a pair of functions z_seialize / z_deserialize called explicitly

Here are tasks/PRs related to new API

• zenoh feat!: move serialization into zenoh-ext #1473
• zenoh-c serialization refactoring zenoh-c#720
• zenoh-pico serialization refactoring zenoh-pico#691
• zenoh-cpp Serialization refactoring zenoh-cpp#238
• python feat: move serialization to zenoh.ext zenoh-python#344
• kotlin Api sync zenoh-kotlin#246
• de-unstable chore: make zenoh-ext unstable except serialization #1492
  • zenoh-c make serialization stable zenoh-c#730
  • zenoh-pico make serialization stable zenoh-pico#701
  • zenoh-cpp make serialziation stable zenoh-cpp#239
• update plugins
  • new serailzer API update zenoh-backend-influxdb#243
  • new serialization API update zenoh-backend-filesystem#236
  • update to newserialziation API zenoh-backend-rocksdb#223
  • Fix incompatibility with new serialization api zenoh-backend-s3#191
  • new serializer API Update zenoh-plugin-dds#351
  • update for new serialization API zenoh-plugin-ros1#171
  • update to new serialization API zenoh-plugin-webserver#188
  • update to use new serialization zenoh-plugin-mqtt#232
  • Use new Serialization and zenoh-ext API zenoh-plugin-ros2dds#279
• import zenoh ext wiht internal feature
  • import zenoh ext with internal feature for using VarInt zenoh-c#732
  • added zenoh-ext/internal feature for opaque-types generator zenoh-c#733
  • kotlin

[Charles-Schleich]

@milyin :
DDS PR: eclipse-zenoh/zenoh-plugin-dds#351
MQTT: eclipse-zenoh/zenoh-plugin-mqtt#232
Ros2DDS PR : eclipse-zenoh/zenoh-plugin-ros2dds#279