feat : Yaml based Plugin for CLI features

[smarchone]

Below are powered via YAML instead of binaries:

1. Survey questions for job_create & job_adhook
2. Plugin Info

Changes include:

• model Plugin to contain YamlMod reference to PluginSpec which implements CommandLineMod Interface.
• Plugin discovery:
  • load binary plugins first
  • then load yaml plugin only if a binary (with the same name) is not loaded
• Plugin.YamlMod to drive survey (job create & add hook); instead of CLIMod if plugin is loaded as yaml
• Sorting Plugins listing
• Add yaml plugin validation (strict) optimus plugin validate --path {{yaml || dir}} (--print)

[coveralls]

Pull Request Test Coverage Report for Build 2999216758

• 156 of 169 (92.31%) changed or added relevant lines in 2 files are covered.
• 215 unchanged lines in 5 files lost coverage.
• Overall coverage increased (+1.4%) to 77.223%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
plugin/yaml/plugin.go	84	88	95.45%
models/plugin.go	72	81	88.89%
<!--	Total:	156	169

Files with Coverage Reduction	New Missed Lines	%
models/plugin.go	1	52.68%
api/handler/v1beta1/job_spec.go	15	71.43%
models/job.go	23	46.91%
ext/scheduler/airflow2/airflow.go	41	83.22%
job/service.go	135	55.15%
<!--	Total:	215

Totals
Change from base Build 2918369205:	1.4%
Covered Lines:	7615
Relevant Lines:	9861

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💛 - Coveralls