Add ghcide configuration files

This commit adds three new files

1. A hie.yaml file to the project root which specifies to IDEs how to
set up the correct environment for loading GHC. This currently
specifies to call the `./hadrian/hie-bios` script.
2. A `hie.yaml` file for the hadrian subcomponent, which uses the
`cabal` cradle type.
2. The `./hadrian/hie-bios` script which supplies the correct arguments
for an IDE to start a session.

With these two files it is possible to run

```
ghcide compiler/
```

and successfully load all the modules for use in the IDE.

or

```
ghcide --cwd hadrian/ src/
```

to test loading all of Hadrian's modules.

Closes #17194

0 files changed, 0 insertions, 0 deletions