[Lldb-commits] [lldb] [lldb-dap] Add an introductory message on startup. (PR #170795)

[Ebuka Ezike via lldb-commits]

da-viper wrote:

The more I look at it seems we need to advertise the repl mode. As there is no other way for the user to know there is a repl-mode except reading the docs. something similar to.

```
Debug console in `auto` repl-mode.
Type <variable> or <lldb-commands> to evaluate a command or variable.
Prefix lldb-commands with '`' to avoid conflicts with local variables.
Type "help lldb-dap repl-mode" for more information on repl-mode.
```

applies to other repl-modes. We can then add more information or examples in the `repl-mode` help docs. 

That way the intro message does not look spammy, every time we launch dap.


https://github.com/llvm/llvm-project/pull/170795