mapping-io CLI

This fork contains the following PRs:

• #13 Add support for ordered MappingTreeView.accept
• #16 Add JarReader
• #17 Add JsonWriter

ASM has been updated to version 9.3, build with ./gradlew shadowJar.

Usage: java -jar mapping-io-cli.jar COMMAND
  Commands:
    convert IN OUT FORMAT
      IN:     input file, format is detected
      OUT:    output file
      FORMAT: output file format
    yarnfulldescs JAR YARN OUT FORMAT
      JAR:    jar descs input file, format is detected
              must contain only a source ns
      YARN:   merged yarn input file, format is detected
              must contain source ns named official, dst ns intermediary and named
      OUT:    output file
      FORMAT: output file format
  Formats:
    TINY
    TINY_2
    ENIGMA
    MCP
    SRG
    TSRG
    TSRG2
    PROGUARD
    JAR
    JSON