Move crypto.rs into common

- Refactor code and move crypto.rs into the common subdirectory.
- Fixed comments

src/commands/introducer/remove.rs

@@ -1,11 +1,30 @@
 use anyhow::Result;
 
-use crate::cli::cli_args::IntroducerRemoveCommand;
-use crate::config::HuskConfigContainer;
+use sequoia_openpgp::{Fingerprint, KeyHandle};
+use sequoia_cert_store::Store;
 
-pub async fn dispatch(cmd: IntroducerRemoveCommand, _config: &HuskConfigContainer) -> Result<()> {
+use crate::cli::cli_args::IntroducerRemoveCommand;
+use crate::commands::CommandError;
+use crate::config::HuskConfigContainer;
+use crate::types::husk_context::HuskContext;
+use crate::types::introducer::Introducer;
+
+pub async fn dispatch(cmd: IntroducerRemoveCommand, config: HuskConfigContainer) -> Result<()> {
     println!("remove");
     println!("   {:?}", cmd.cert);
+    println!("   {:?}", cmd.demote);
+
+    let context = HuskContext::new(&config.into())?;
+    let policy = &context.policy;
+    let cert_store = &context.cert_store;
+
+    // Get the certificate
+    let fpr = Fingerprint::from_hex(&cmd.cert)?;
+    let certs = cert_store.lookup_by_cert(&KeyHandle::try_from(&fpr)?)
+        .map_err(|_| CommandError::CertNotFound(fpr.clone()))?;
+
+
+
     Ok(())
 }