feat(users/Profpatsch): global shell for my userdir

For my tooling, I want to be able to use vscode language servers for
all subprojects, and the best ways to do that I’ve found so far is to
add a global shell.nix which contains the transitive closure of all
dependencies I need.

This is not /nice/ per se, but it does the job with minimal effort
right now and gives me a good development environment for all these
crazy & dumb experiments in here.

Change-Id: I717a72f490e9d58d45e4e15e9ba604c36b299814
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7794
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>

users/Profpatsch/.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+    "sqltools.connections": [
+        {
+            "previewLimit": 50,
+            "driver": "SQLite",
+            "name": "cas-serve",
+            "database": "${workspaceFolder:Profpatsch}/cas-serve/data.sqlite"
+        }
+    ],
+    "sqltools.useNodeRuntime": true,
+    "[haskell]": {
+        "editor.formatOnSave": true
+    }
+}