Split off functional contact tools into its own crate (#5444)

I would like to implement
https://github.com/deltachat/deltachat-core-rust/issues/5422 in its own
crate, but it will depend on some functions that are in the `deltachat`
crate.

So, this PR extracts these functions into its own crate so that I can
add https://github.com/deltachat/deltachat-core-rust/issues/5422 into
the new crate.

Cargo.lock

@@ -1159,6 +1159,7 @@ dependencies = [
  "brotli",
  "chrono",
  "criterion",
+ "deltachat-contact-tools",
  "deltachat-time",
  "deltachat_derive",
  "email",
@@ -1224,6 +1225,16 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "deltachat-contact-tools"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "once_cell",
+ "regex",
+ "rusqlite",
+]
+
 [[package]]
 name = "deltachat-jsonrpc"
 version = "1.137.2"