.NET 9 compiling

[leppie]

Tracks #158

Currently on .NET 9 preview 3. Preview 4 will bring PDB support.

MS issue ref: dotnet/runtime#92975

Create file called net9.sls in build output dir:

(library (net9)
 (export test-1 test-2 test-3)
 (import (ironscheme))

 (define-syntax inter
   (lambda (x)
    #''((hello) (world))))

 (define (test-1) 'foo)    ; basic
 (define (test-2) (inter)) ; constants
 (define (test-3)          ; closure
   (let ((a 1))
     (lambda () a))))

Start IronScheme.Console with net9 target.

Run the following:

(import (net9))
(compile)

[leppie]

Everything hacked together. Compiling and bootstrapping works.

AppVeyor does not have .NET 9 SDK yet...