Pnpm move

[zorkow]

Changes build system to pnpm. Major changes are:

• pnpm does not run pre and post hooks for custom scripts. (They still work for lifecycle scripts).
• Scripts are now separated topically into CJS and MJS scripts. There all still some general scripts of copy, clean, etc.
• Scripts try to make the execution flow as transparent as possible. They are mainly separated into two types
  • Compound scripts that execute multiple. They produce blue logging output.
  • Single scripts that execute a single command or action. They produce brown output.
• All scripts use : separation to construct names as meaningful as possible. Exception are some legacy script names - now mainly aliases - like make-components.
• The link:full does not have to execute explicitly anymore
• clean also removes bundle-cjs
• pack now uses pnpm instead of npx. However, the former needs to be executed in the root directory of the repository. So the paths need to be given relative to root and not to the directory of the component that is packed.
• Replaces all occurrences of substr in the node scripts with substring.

[zorkow]

Made changes as discussed in PR #1023

[dpvc]

One last potential change, but otherwise looks good.