Lucas/t 231 timebox i can create a company at the same time im creating (#140)

This PR is a bit messy:

adding graphql schema
adding create company creation on company select on People page
some frontend refactoring to be continued

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Co-authored-by: Charles Bochet <charles@twenty.com>

front/src/components/editable-cell/CellNormalModeContainer.tsx

@@ -0,0 +1,12 @@
+import styled from '@emotion/styled';
+
+export const CellNormalModeContainer = styled.div`
+  display: flex;
+  align-items: center;
+  width: calc(100% - ${(props) => props.theme.spacing(5)});
+  height: 100%;
+  overflow: hidden;
+
+  padding-left: ${(props) => props.theme.spacing(2)};
+  padding-right: ${(props) => props.theme.spacing(2)};
+`;