v6.5.0
[docs] Remove obsolete translations (#39221)
[material-ui][mui-system] Stabilize Grid v2 and deprecate Grid v1 (#43054)
[docs] Add `theme.applyStyles` and migrate docs (#42498)
[core] Prepare stable release from the `v6.x` branch (#45133)
[core] Prepare v6 branch for v7 stable release (#45668)
Prepare for v6 stable release (#43454)
[docs] Migrate system props to `sx` prop (#42475)
[docs] Fix brand name non-breaking space (#40701)
[docs][material-ui][system] Edit "How to use components selector API" section to add about direct import (#43377)
[material-ui][docs] Add first batch of v6 migration (#42242)
[system] Add `Stack` component (#33760)