refactor: move firmware workspace under firmware

firmware/libs/kaptan-drivers/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "kaptan-drivers"
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+version.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+kaptan-log = { path = "../kaptan-log" }
+kaptan-sensor = { path = "../kaptan-sensor" }
+kaptan-i2c = { path = "../kaptan-i2c" }
+kaptan-spi = { path = "../kaptan-spi" }
+kaptan-time = { path = "../kaptan-time" }