feat: add a service commnd

[LinuxSuRen]

The following command will install atest as a Linux service. atest service --action install.

Set the default service port to be 7070 to avoid confliction

[codacy-production]

Coverage summary from Codacy

Merging #39 (8ed8394) into master (9ee38ff) - See PR on Codacy

Coverage variation	Diff coverage
+3.76%	97.22%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (9ee38ff)	914	784	85.78%
Head commit (8ed8394)	965 (+51)	864 (+80)	89.53% (+3.76%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#39)	72	70	97.22%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

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