Migrate IPyPiClient cache to LRU MemoryCache

[cobya]

Updates the caching mechanism in IPyPiClient from using a ConcurrentDictionary to a Microsoft.Extensions.Caching.Memory MemoryCache which allows setting a maximum number of cache entries and a cache entry expiration time. By limiting the number of entries the memory usage will be lowered and because of expiration time if the tool has not finished by the time the cache is no longer being used memory will be freed before exiting the program.

For users that need additional configuration (potentially due to memory constraints), allow them to set a maximum number of cache entries using the PyPiMaxCacheEntries environment variable.

This resolves the issue #35

[github-actions]

👋 Hi! It looks like you modified some files in the Detectors folder.
You may need to bump the detector versions if any of the following scenarios apply:

• The detector detects more or fewer components than before
• The detector generates different parent/child graph relationships than before
• The detector generates different devDependencies values than before

If none of the above scenarios apply, feel free to ignore this comment 🙂

[JamieMagee]

Were this just an estimate?

[cobya]

Yes, they are currently an estimate, but introduced a new telemetry class to track cache usage statistics so we can adjust in the future.

[JamieMagee]

@cobya Sorry! I accidentally had the wrong issue number in my PR.