feat: Add redisclient package to the monorepo

- Integrate the redisclient package into the workspace.
- Update the MONOREPO_CONVERSION_PLAN.md to reflect the
  completion of the redisclient package conversion.
  This includes marking its conversion as complete and
  updating the success metrics.
- Add the redisclient package's Cargo.toml file.
- Add the redisclient package's source code files.
- Add tests for the redisclient package.
- Add README file for the redisclient package.

redisclient/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "sal-redisclient"
+version = "0.1.0"
+edition = "2021"
+authors = ["PlanetFirst <info@incubaid.com>"]
+description = "SAL Redis Client - Redis client wrapper with connection management and Rhai integration"
+repository = "https://git.threefold.info/herocode/sal"
+license = "Apache-2.0"
+keywords = ["redis", "client", "database", "cache"]
+categories = ["database", "caching", "api-bindings"]
+
+[dependencies]
+# Core Redis functionality
+redis = "0.31.0"
+lazy_static = "1.4.0"
+
+# Rhai integration (optional)
+rhai = { version = "1.12.0", features = ["sync"], optional = true }
+
+[features]
+default = ["rhai"]
+rhai = ["dep:rhai"]
+
+[dev-dependencies]
+# For testing
+tempfile = "3.5"