feat: add local helm chart support

[tobifroe]

This resolves #49 be enabling local helm chart support.

[coveralls]

Pull Request Test Coverage Report for Build 2890756641

• 28 of 90 (31.11%) changed or added relevant lines in 11 files are covered.
• 6 unchanged lines in 6 files lost coverage.
• Overall coverage decreased (-0.9%) to 63.524%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
getdeck/main.py	1	4	25.0%
getdeck/api/list.py	1	4	25.0%
getdeck/api/remove.py	4	8	50.0%
getdeck/utils.py	7	11	63.64%
getdeck/sources/file.py	1	7	14.29%
getdeck/sources/helm.py	2	9	22.22%
getdeck/sources/tooler.py	1	14	7.14%
getdeck/api/hosts.py	1	23	4.35%

Files with Coverage Reduction	New Missed Lines	%
getdeck/api/hosts.py	1	29.55%
getdeck/api/list.py	1	53.33%
getdeck/api/remove.py	1	31.03%
getdeck/main.py	1	77.33%
getdeck/sources/helm.py	1	79.52%
getdeck/utils.py	1	51.31%

Totals
Change from base Build 2890274274:	-0.9%
Covered Lines:	1132
Relevant Lines:	1782

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💛 - Coveralls

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication