Geo-espresso

Espresso core

- Fix `list_capabilities` and enhance related documentation

First release.

Changed examples

- Fix installation of receiver function on Windows
- Fix documentation rendering of 1D MT problem

Changed examples

- Fix installation of receiver function under SKBUILD

New examples

- [106](https://github.com/inlab-geo/espresso/pull/106) Receiver function

Changed examples

- Naming changes
- `FmmTomography` -> `FmWavefrontTracker`
- `XrayTomography` -> `XrayTracer`

Infrastructure

- Build and validation scripts to run only on specified contributions
- CI to test only changed contributions on pull request
- Write changed contributions to file
- Routinely check and update active problems list
- Timeout value defaults to 60 seconds for each method

Infrastructure

- [118](https://github.com/inlab-geo/espresso/pull/118) Capability matrix on build
- [121](https://github.com/inlab-geo/espresso/pull/121) Compile on build (instead of on import)
- Code refactor in `espresso_machine`