Read the installed game version from KSA.dll

[Maximilian-Nesslauer]

Closes #38.

Borea could not tell which game build is installed, so nothing could answer whether a mod fits it.

InstalledGameVersionProvider reads the version resource of KSA.dll, the first two steps of RFC 0017's chain. The Content/Versions fallback still needs to be done as a follow-up.

Four ways to have no answer all return null if the game location is unknown, the file is not there, it is not a PE, or it carries no version resource.

The tests need real version resources, so two fixture projects build assemblies that carry nothing else, and a test copies one in under the game's file name.

No caller acts on it yet. It feeds #55, where installed?.Version reaches Compatibility.Evaluate with no adapter and both null paths land on Unknown.

[coveralls]

Coverage Report for CI Build 33703589041

Coverage increased (+0.04%) to 90.27%

Details

• Coverage increased (+0.04%) from the base build.
• Patch coverage: 19 of 19 lines across 2 files are fully covered (100%).
• No coverage regressions found.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	1906
Covered Lines:	1763
Line Coverage:	92.5%
Relevant Branches:	951
Covered Branches:	816
Branch Coverage:	85.8%
Branches in Coverage %:	Yes
Coverage Strength:	42.51 hits per line

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