[core] Batch small changes

[oliviertassinari]

• [docs] Apply documentation convention 99e194c: prefer function in the docs
• [docs] Add missing link for badge API 638a4e4: for consistency with slider
• [docs] Adobe XD has components not symbols 733f561: a fact
• [core] cpy-cli is no longer used 684eebc: self explanatory
• [CHANGELOG] Fix small mistake e9a8bfc: oops, my bad
• [docs] Fix indentation ffe8b65: to better render
• [docs] Link rational, in case we don't rollback 2a473d1: We have talked about taking a step back and introduce. the props back. The discussion starts at [RFC] v5 styling solution 💅 #22342 (comment).
• [docs] Clear .next cache f96b45f: I have faced an issue with Marija unstyled components where I needed to clear the cache. We probably want to do it anytime anyway.
• [docs] Update a bit the templates to the latest API and design prefer abba8db: I'm excited about the opportunity we have to improve the templates in v5. We can remove almost all the withStyles with the system. We can update the design to be more aligned with how Material Design is used by Google on desktop products. We can use the DataGrid component in the dashboard demo.
• [docs] Add a light box-shadow touch 59eac37: a nice touch that helps when the color is light, to create contrast with its white surrounding.

[mui-pr-bot]

Details of bundle changes

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