Various quality of life additions, tweaks, and fixes

[SmilyOrg]

Added

• New documentation pages
• CHANGELOG.md
• New search filters for filtering by date, query similarity, deduplication (see the new docs)

Changed

• Increased the default image cache to 1 GiB
• Later collections with the same name now override earlier collections, allowing for specific collections of an expanded collection to be configured
• Cleaned up README now that there is better documentation

Fixed

• Timezones are now accounted for in cases the camera writes both a date with and without a timezone without specifying it explicitly
• Black bars in letter/pillarboxed JPEG thumbnails generated by some cameras are now cropped automatically
• Image cache size configuration did not apply properly before even through defaults.yaml implied it was possible, now fixed
• Fixed the default width and height for photos for all layouts in case metadata is not present, fixes broken albums in some cases

[SmilyOrg]

I should create & merge PRs more often, maybe the new changelog makes it easier 🤷‍♂️