Upgrade to Zig 0.14

[lalinsky]

No description provided.

[coderabbitai]

Walkthrough

This pull request updates project configuration, including the project name, minimum Zig version, and fingerprint in the build configuration. It also modifies various internal comparison functions by renaming and introducing new ordering methods. Several modules have revised sorting and comparison operations, while changes to type usage are evident in the main and file output functions. Additionally, server error handling and configuration have been adjusted, and there is a minor modification in the reference counter decrement logic.

Changes

File(s)	Change Summary
build.zig.zon	Updated project metadata: project name changed from literal ("fpindex") to reference (.fpindex), minimum Zig version increased from "0.13.0" to "0.14.0", added .fingerprint, and dependency URLs/commit hashes updated to master branch references.
src/FileSegment.zig, src/MemorySegment.zig, src/Oplog.zig, src/segment.zig, src/segment_merger.zig	Revised comparison and sorting functions: updated memory alignment (from std.mem.page_size to std.heap.page_size_min in FileSegment), added compareHashes, renamed cmp to lessThan, removed cmpByHash in favor of new methods (order/orderByHash), and adjusted sort calls (e.g., lowerBound, equalRange, and PDQ sort) accordingly.
src/main.zig, src/filefmt.zig	Modified explicit type usage: changed std_options from an anonymous struct to std.Options in main and removed explicit structure type references in packer.write calls in filefmt.
src/server.zig	Added public functions notFound and uncaughtError in Context; changed Server type from httpz.ServerApp(*Context) to httpz.Server(*Context); updated installSignalHandlers to return void; and adjusted route handler calls and msgpack serialization calls by removing explicit type parameters.
src/utils/shared_ptr.zig	Updated reference counter decrement logic: replaced the memory fence call with a load call (self.refs.load(.acquire)) in the decr method.
src/index_tests.zig, src/segment_merge_policy.zig	Updated random number generation: changed PRNG initialization from std.rand to std.Random and adjusted random integer generation calls accordingly.
.github/workflows/build-legacy-proxy.yml	Removed step using actions/setup-python@v5 for Python setup in the GitHub Actions workflow.

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