feat(3p/lisp): Add many packages

Add the following packages along with their transitive dependencies:
- trivial-ldap
- defclass-std
- easy-routes

Change-Id: Ib24517f18d14d57540362132c9a24ff2a5a4bd9d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1336
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: kanepyork <rikingcoding@gmail.com>

third_party/lisp/anaphora.nix

@@ -0,0 +1,18 @@
+{ depot, pkgs, ... }:
+
+let src = pkgs.fetchFromGitHub {
+    owner = "tokenrove";
+    repo = "anaphora";
+    rev = "018590df36ffb30ece561fb28ea6521363efc6e2";
+    sha256 = "0pq6y5swvrjd0kjs2dl2648s13s0pzxin0chrq35jam8jrci3kd1";
+  };
+in depot.nix.buildLisp.library {
+  name = "anaphora";
+
+  srcs = map (f: src + ("/" + f)) [
+    "packages.lisp"
+    "early.lisp"
+    "symbolic.lisp"
+    "anaphora.lisp"
+  ];
+}