feat: add storage layer to remote-settings component

.circleci/config.yml

@@ -145,6 +145,10 @@ commands:
       - run:
           name: Verify the build environment
           command: ./libs/verify-desktop-environment.sh
+      # Install SQLite development libraries
+      - run:
+          name: Install SQLite development libraries
+          command: sudo apt-get install libsqlite3-dev
   run-tests:
     steps:
       - run: automation/tests.py rust-tests

components/remote_settings/Cargo.toml

@@ -21,6 +21,7 @@ error-support = { path = "../support/error" }
 viaduct = { path = "../viaduct" }
 url = "2.1" # mozilla-central can't yet take 2.2 (see bug 1734538)
 camino = "1.0"
+rusqlite = "0.31.0"
 
 [build-dependencies]
 uniffi = { workspace = true, features = ["build"] }
@@ -32,4 +33,4 @@ mockall = "0.11"
 mockito = "0.31"
 # We add the perserve_order feature to guarantee ordering of the keys in our
 # JSON objects as they get serialized/deserialized.
-serde_json = { version = "1", features = ["preserve_order"] }
+serde_json = { version = "1", features = ["preserve_order"] }

components/remote_settings/src/error.rs

@@ -45,6 +45,8 @@ pub enum Error {
     AttachmentsUnsupportedError,
     #[error("Error configuring client: {0}")]
     ConfigError(String),
+    #[error("Database error: {0}")]
+    DatabaseError(#[from] rusqlite::Error),
 }
 
 // Define how our internal errors are handled and converted to external errors