Implement theme prop for source-react-component components

[oliverabrahams]

We are updating the implementation of themes in Source React components from a request for a new dark mode for DCAR. This involves a few changes to the way themes are handled in our Source React components:

• Add theme prop with new theme object.
• Create the new object with property names from figma.
• Deprecate old theme for components.

### Tasks
- [x] https://github.com/guardian/csnx/issues/1125
- [ ] https://github.com/guardian/csnx/issues/1140
- [ ] https://github.com/guardian/csnx/issues/1124
- [ ] https://github.com/guardian/csnx/issues/1138
- [x] https://github.com/guardian/csnx/issues/1139
- [ ] https://github.com/guardian/csnx/issues/1142
- [ ] https://github.com/guardian/csnx/issues/1143
- [ ] https://github.com/guardian/csnx/issues/1144
- [ ] https://github.com/guardian/csnx/issues/1145
- [ ] https://github.com/guardian/csnx/issues/1136
- [ ] https://github.com/guardian/csnx/issues/1148
- [ ] https://github.com/guardian/csnx/issues/1154
- [x] https://github.com/guardian/csnx/issues/1159
- [x] https://github.com/guardian/csnx/issues/1160
- [x] https://github.com/guardian/csnx/issues/1161
- [ ] https://github.com/guardian/csnx/issues/1158
- [ ] https://github.com/guardian/csnx/issues/1176
- [ ] https://github.com/guardian/csnx/issues/1166