add e2e of imageOverrider (karmada-io#379)

Signed-off-by: changzhen <[email protected]>

Add E2E failover test. (karmada-io#268)

Signed-off-by: mabotao <[email protected]>

Modify some function names.

Signed-off-by: mabotao <[email protected]>

Adding reschedule function in scheduler.go (karmada-io#198)

Signed-off-by: tinyma123 <[email protected]>

Co-authored-by: mabotao <[email protected]>

support spread constraints (karmada-io#168)

Signed-off-by: lihanbo <[email protected]>

Added scheduler framework and basic functionality(karmada-io#108)

Signed-off-by: xuzhonghu <[email protected]>

update architecture and concepts

Signed-off-by: Kevin Wang <[email protected]>