add copyrigth header and plugin which can add copyright automatically…

[wgs13579]

… when build

Ⅰ. Describe what this PR did

add copyrigth header and plugin which can add copyright automatically when build

Ⅱ. Does this pull request fix one issue?

Ⅲ. Why don't you add test cases (unit test/integration test)?

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov-io]

Codecov Report

Merging #882 into develop will increase coverage by 0.16%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##             develop     #882      +/-   ##
=============================================
+ Coverage      38.66%   38.82%   +0.16%     
- Complexity      1026     1028       +2     
=============================================
  Files            220      220              
  Lines           8507     8507              
  Branches        1028     1028              
=============================================
+ Hits            3289     3303      +14     
+ Misses          4826     4813      -13     
+ Partials         392      391       -1

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/io/seata/core/rpc/netty/RpcServer.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...seata/core/rpc/netty/ChannelAuthHealthChecker.java	0% <ø> (ø)	0 <0> (ø)	⬇️
.../io/seata/common/exception/FrameworkException.java	77.77% <ø> (ø)	12 <0> (ø)	⬇️
.../main/java/io/seata/rm/datasource/sql/SQLType.java	91.07% <ø> (ø)	2 <0> (ø)	⬇️
...o/seata/rm/datasource/AbstractConnectionProxy.java	4.76% <ø> (ø)	1 <0> (ø)	⬇️
...urce/sql/druid/MySQLSelectForUpdateRecognizer.java	69.04% <ø> (ø)	5 <0> (ø)	⬇️
...ava/io/seata/core/rpc/netty/RmMessageListener.java	0% <ø> (ø)	0 <0> (ø)	⬇️
...re/protocol/transaction/BranchRegisterRequest.java	73.68% <ø> (ø)	13 <0> (ø)	⬇️
...e/protocol/transaction/BranchRollbackResponse.java	50% <ø> (ø)	1 <0> (ø)	⬇️
...ta/discovery/registry/FileRegistryServiceImpl.java	61.53% <ø> (ø)	7 <0> (ø)	⬇️
... and 206 more

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[xingfudeshi]

LGTM.