ksud: Optimise ksud (#576)

* opt: Optimize printing for result isn't successful
- print chain && backtrace to stderr

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* ci(ksud): add CARGO_TERM_COLOR for build

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* fix(ksud): fix uninstall package name is `me.weishu.kernelsu`

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* fix(ksud): Reverted to a private function for get_kernel_version

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* chore: format code for magic_mount.rs

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* fix: fix rustfmt

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* feat: Move the statement to the correct place && remove allow dead_code

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userspace/ksud/src/boot_patch.rs

@@ -24,7 +24,7 @@ fn ensure_gki_kernel() -> Result<()> {
 }
 
 #[cfg(target_os = "android")]
-pub fn get_kernel_version() -> Result<(i32, i32, i32)> {
+fn get_kernel_version() -> Result<(i32, i32, i32)> {
     let uname = rustix::system::uname();
     let version = uname.release().to_string_lossy();
     let re = Regex::new(r"(\d+)\.(\d+)\.(\d+)")?;