add: request-to-join communities

add: private joined communities setting
add: "void" community
add: ability to delete communities

Cargo.lock

@@ -145,6 +145,17 @@ version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7c02d123df017efcdfbd739ef81735b36c5ba83ec3c59c80a9d7ecc718f92e50"
 
+[[package]]
+name = "async-recursion"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b43422f69d8ff38f95f1b2bb76517c91589a924d1559a0e935d7c8ce0274c11"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "async-trait"
 version = "0.1.88"
@@ -3066,6 +3077,7 @@ dependencies = [
 name = "tetratto-core"
 version = "0.1.0"
 dependencies = [
+ "async-recursion",
  "bb8-postgres",
  "bitflags 2.9.0",
  "pathbufd",