use SQLCipher (#981)

* use SQLCipher

* pass encryption key via CLI options

* update dependencies to use git

* add CONTRIBUTING.md

* move flag, enable build in sqlcipher branch

* update dependencies

docs/CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing guide
+
+## Compiling with SQLCipher encryption enabled
+
+Add `cabal.project.local` to project root with the location of OpenSSL headers and libraries and flag setting encryption mode:
+
+```
+ignore-project: False
+
+package direct-sqlcipher
+    extra-include-dirs: /opt/homebrew/opt/openssl@3/include
+    extra-lib-dirs: /opt/homebrew/opt/openssl@3/lib
+    flags: +openssl
+```
+
+OpenSSL can be installed with `brew install openssl`