Feat: add mirror support

[Neko-vecter]

Important

It still working on

This PR is able let moonraker support change klipper / moonraker / webui mirror

• set different location for git repo it will require set dev_mode: True
  • it will allow user to change git repo from moonraker.conf
• set a mirror for webui will require set enable_mirror: True
  • it allow user to change net deploy release file to a custom mirror.
  • webui mirror toolkit Neko-vecter/moonraker-mirror-toolkit

below is config example in moonraker.conf

[update_manager moonraker]
dev_mode: True
origin: https://<mirror>/moonraker.git

[update_manager klipper]
dev_mode: True
origin: https://<mirror>/klipper.git

[update_manager mainsail]
type: web
channel: stable
repo: mainsail-crew/mainsail
path: ~/mainsail

enable_mirror: True
mirror_url: https://<mirror>/mainsail-release/
mirror_latest_template: {base_url}/LatestRelease/release
mirror_tag_template: {base_url}/{tag}/release

is relate to issue #470

-Neko.vecter