refactor(schedule): use server API types for schedule

[wsan3]

Description

Moved Schedule out of go-vela/types and into go-vela/server. Updated imports in CLI to reflect those changes.

Related

go-vela/server#1108

[wass3rw3rk]

update go.mod to pull in new types changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.38%. Comparing base (c4a682a) to head (ec98172).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #553   +/-   ##
=======================================
  Coverage   81.38%   81.38%           
=======================================
  Files         156      156           
  Lines        3803     3803           
=======================================
  Hits         3095     3095           
  Misses        519      519           
  Partials      189      189           

Files	Coverage Δ
action/schedule/add.go	90.90% <100.00%> (ø)
action/schedule/table.go	100.00% <100.00%> (ø)
action/schedule/update.go	100.00% <100.00%> (ø)