doc(hubble): enhance hubble usage doc/command

[returnToInnocence]

Purpose of the PR

• Currently, the git download target directory and the cd target file directory are inconsistent, so we are trying to unify them

Main Changes

• Change "cd incubator-hugegraph-toolchain" in en doc Section 2.3 to "cd hugegraph-toolchain"
• Change "cd incubator-hugegraph-toolchain" in cn doc Section 2.3 to "cd hugegraph-toolchain"
• In the source compilation section, remove the node and yarn installation flow (en doc & cn doc)
  • The plugin frontend-maven-plugin has been added to hugegraph-hubble/hubble-be/pom.xml. To compile hubble, we do not need to install Nodejs V16.x and yarn environment in your local environment in advance.