Add option to use comma seperated env var for default exclusion

[ProgHaj]

Add option for exclusions-env-var (will only check os.Getenv, so if ran locally need to supply the command with the env variable).

The priority which will be checked is:

1. Exclusion flags (-e "excl1" -e "excl2")
2. Environment variable, os.Gegenv("DEBRICKED_EXCLUSIONS" where DEBRICKED_EXCLUSIONS is a commaseparated list (DEBRICKED_EXCLUSIONS="excl1,excl2")
3. Default parameters { filepath.Join("**", "node_modules", "**"), filepath.Join("**", "vendor", "**"), filepath.Join("**", ".git", "**"), filepath.Join("**", "obj", "**"), }

When exclusions are found, rest of the priorities won't be checked.

Fixes #122

[github-actions[bot]]

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Code Health Quality Gates	✅ OK
Recommended Review Level	Lightweight sanity check
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Improving Code Health	0 findings(s) ✅
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