* moved themecontext to data
* chore(grafana-ui): re-export ThemeContext from grafana/data for backwards compatibility
* Moved icon bundling to core.
* feat(plugins): share react-inlinesvg with plugins for grafana/ui bundling
* chore(codeowners): add generate-icon-bundle.js to file
* chore(storybook): update path to iconBundle file for theme
* feat(plugins): share i18n dependency via systemjs
* Make sure that icon bundle is initialized for tests.
* Removed comment.
* added tests for icon root.
* Removing the need of having an init variable.
* feat(grafana-ui): add icon svgs to bundle for projects that don't rely on grafana
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Co-authored-by: Marcus Andersson <marcus.andersson@grafana.com>