ci: check license header tool

[tisonkun]

Use hawkeye to check license headers. Apply with the standard Apache License 2.0 header.

You can review in commits and skip the globally apply changes one.

[tisonkun]

cc @ShiKaiWi @ZuLiangWang

[codecov[bot]]

Codecov Report

Merging #269 (38b98d5) into main (7f1354e) will increase coverage by 19.62%. Report is 64 commits behind head on main. The diff coverage is 55.82%.

@@             Coverage Diff             @@
##             main     #269       +/-   ##
===========================================
+ Coverage   39.66%   59.28%   +19.62%     
===========================================
  Files          34       42        +8     
  Lines        4213     5792     +1579     
===========================================
+ Hits         1671     3434     +1763     
+ Misses       2317     1945      -372     
- Partials      225      413      +188     

Files	Coverage Δ
pkg/coderr/code.go	0.00% <ø> (ø)
pkg/coderr/error.go	39.02% <100.00%> (+1.52%)	:arrow_up:
server/coordinator/lock/entry_lock.go	100.00% <100.00%> (ø)
server/coordinator/procedure/delay_queue.go	91.30% <100.00%> (+0.25%)	:arrow_up:
server/coordinator/procedure/util.go	0.00% <ø> (ø)
server/etcdutil/config.go	100.00% <ø> (ø)
server/etcdutil/util.go	45.45% <ø> (ø)
server/id/reusable_id_impl.go	100.00% <100.00%> (ø)
server/member/lease.go	78.62% <100.00%> (+1.46%)	:arrow_up:
server/storage/key_path.go	100.00% <ø> (ø)
... and 32 more