v1.5-beta: documentation lacks

[interduo]

Hi @rchac

Could You add informations to new v1.5 docs in readthedocs.io ? Changes needed:

• information about recomendation of Ubuntu 24.4 LTS,

• information about needed amount of RAM,

• change "v1.4 (Alpha)" to "v1.4" in https://github.com/LibreQoE/LibreQoS/blob/develop/src/README.md,

• the documentation in complex instalation procedure contains:

  cd /opt/libreqos
  python3 -m pip install -r requirements.txt
  sudo python3 -m pip install -r requirements.txt

  where the postinst script in deb package has --break-system-packages (see build_dpkg.sh script),

• what for is the step:

  cd rust
  cargo build --all

  build_rust.sh contains cargo build command here: https://github.com/LibreQoE/LibreQoS/blob/main/src/build_rust.sh#L62