Remove rust-analyzer temporary files and update .gitignore

- Remove target/rust-analyzer/flycheck0/stderr and stdout files
- Add Rust-related ignore patterns to .gitignore
- Prevent rust-analyzer temporary files from being tracked

Author: foxg1ove1

.gitignore

@@ -63,3 +63,12 @@ vdso.lds
 # stm32cubemx
 **/CubeMX_Config/Drivers/
 **/CubeMX_Config/MDK-ARM/
+
+# Rust
+target/
+Cargo.lock
+*.rs.bk
+*.pdb
+
+# rust-analyzer
+**/target/rust-analyzer/