feat: add legacy didcomm v1 pack and unpack impl

Signed-off-by: Daniel Bluhm <dbluhm@pm.me>

Author: dbluhm

.pre-commit-config.yaml

@@ -1,14 +1,14 @@
 ---
 repos:
   - repo: https://github.com/alessandrojcm/commitlint-pre-commit-hook
-    rev: v9.5.0
+    rev: v9.16.0
     hooks:
       - id: commitlint
         stages: [commit-msg]
         args: ["--config", ".commitlint.config.js"]
         additional_dependencies: ['@commitlint/config-conventional']
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.4.1
+    rev: v0.4.5
     hooks:
       - id: ruff
         stages: [commit]