feat: add non formatting methods for golang 1.24 govet (#17)

fix: when calling meta multiple times, keep previously set metas (#16)

fix: when calling meta multiple times, keep previously set metas (#16)

fix: panic when location skip is too high (#14)

fix: remove duplicate values in metadata (#13)

feat: return a uniform error interface (#12)

In order to simplify the interface, the New and Wrap now return a
standard `error`. Also, we fix the differences in frame skipping when
using errors directly or the builder.

This changes the interface quite a bit, so it's a major version bump.

feat: multiple improvements (#11)

Added a context to the error as a source of metadata.
Added a builder to create errors with options.
Better documentation and examples.

fix: optimize stacktrace creation (#10)

There is no need to inspect all the stack frames once we hit the stdlib
code from GOROOT, since it's unlikely that this code will call back
user code.

fix: present stacktraces as continuous instead of 2 blocks (#9)

feat: introduce stacktraces as an option (#8)