feat: add scan subcommand — recommends applicable isers per repo

Implements `iseriser scan [--path PATH] [--json]` which walks a repo,
detects 15 signal categories, and recommends which hyperpolymath -iser
tools should be applied.  Output is a confidence-sorted table (high →
medium → low) or JSON.  Covered isers: k9iser, eclexiaiser, wokelangiser,
alloyiser, tlaiser, idrisiser, typedqliser, chapeliser, ephapaxiser,
verisimiser, otpiser, ponyiser, dafniser, futharkiser, lustreiser.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: hyperpolymath

Cargo.lock

@@ -18,6 +18,7 @@ anyhow = "1"
 thiserror = "2"
 handlebars = "6"
 walkdir = "2"
+serde_json = "1"
 
 [dev-dependencies]
 tempfile = "3"

Cargo.toml

@@ -20,6 +20,7 @@
 pub mod abi;
 pub mod codegen;
 pub mod manifest;
+pub mod scan;
 
 pub use abi::{
     CompilationTarget, GeneratedFile, GeneratedRepo, LanguageModel, Paradigm, ScaffoldResult,

src/lib.rs

@@ -19,6 +19,7 @@ use clap::{Parser, Subcommand};
 mod abi;
 mod codegen;
 mod manifest;
+mod scan;
 
 /// iseriser — Meta-framework: generate new -iser projects
 #[derive(Parser)]
@@ -53,6 +54,15 @@ enum Commands {
         #[arg(short, long, default_value = "iseriser.toml")]
         manifest: String,
     },
+    /// Scan a repository and recommend applicable -iser tools.
+    Scan {
+        /// Path to the repository to scan (default: current directory).
+        #[arg(short, long, default_value = ".")]
+        path: String,
+        /// Output recommendations as JSON instead of a table.
+        #[arg(long, default_value_t = false)]
+        json: bool,
+    },
 }
 
 fn main() -> Result<()> {
@@ -82,6 +92,14 @@ fn main() -> Result<()> {
             let m = manifest::load_manifest(&manifest)?;
             manifest::print_info(&m);
         }
+        Commands::Scan { path, json } => {
+            let recommendations = scan::scan_repo(&path)?;
+            if json {
+                println!("{}", serde_json::to_string_pretty(&recommendations)?);
+            } else {
+                scan::print_table(&recommendations);
+            }
+        }
     }
     Ok(())
 }