feat(installer): Check installation dependencies before execution

[georgkrause]

One thing we might want to do is checking for a git executable as well, since deck version will fail if its not available:

Traceback (most recent call last):
  File "git", line 87, in <module>
  File "git", line 76, in refresh
  File "git.cmd", line 341, in refresh
ImportError: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial warning can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|none|n|0: for no warning or exception
    - warn|w|warning|1: for a printed warning
    - error|e|raise|r|2: for a raised exception

Example:
    export GIT_PYTHON_REFRESH=quiet


The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "getdeck.__main__", line 114, in main
  File "getdeck.api", line 2, in <module>
  File "getdeck.api.get", line 7, in <module>
  File "getdeck.api.hosts", line 10, in <module>
  File "getdeck.utils", line 10, in <module>
  File "getdeck.deckfile.fetch.deck_fetcher", line 11, in <module>
  File "git", line 89, in <module>
ImportError: Failed to initialize: Bad git executable.
The git executable must be specified in one of the following ways:
    - be included in your $PATH
    - be set via $GIT_PYTHON_GIT_EXECUTABLE
    - explicitly set via git.refresh()

All git commands will error until this is rectified.

This initial warning can be silenced or aggravated in the future by setting the
$GIT_PYTHON_REFRESH environment variable. Use one of the following values:
    - quiet|q|silence|s|none|n|0: for no warning or exception
    - warn|w|warning|1: for a printed warning
    - error|e|raise|r|2: for a raised exception

Example:
    export GIT_PYTHON_REFRESH=quiet

[coveralls]

Pull Request Test Coverage Report for Build 3344317195

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 65.836%

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Totals
Change from base Build 3344315521:	0.0%
Covered Lines:	1347
Relevant Lines:	2046

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💛 - Coveralls

[Schille]

@georgkrause why not check for install too?

[georgkrause]

@Schille fair point! Its updated

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
1 Code Smell

No Coverage information
0.0% Duplication