chore: cleanup — untrack binaries, consolidate Go dirs, dedupe tools

- Untrack and delete compiled binaries (tarsum, gosoft.exe, rust uniq/uniq2);
  ignore build outputs (dist/, bin/, *.exe, *.test, .ruff_cache/)
- Merge tools/go/ and projects/go-tools/go/ into projects/go-tools/<name>/
- Fix goipgrep .gitignore: bare 'ipgrep' pattern was ignoring cmd/ipgrep/,
  so the main entrypoint was never tracked; now anchored to /ipgrep
- Archive duplicate implementations to archive/experimental/{rust,go}/
  (uniq, between, tarsum rewrites); canonical versions stay in tools/
- Update README tool catalog to match new layout

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

archive/experimental/rust/uniq.rs

@@ -0,0 +1,41 @@
+use std::env;
+use std::fs::File;
+use std::io::{self, BufRead, BufReader};
+use std::collections::HashSet;
+use std::hash::{Hash, Hasher};
+use std::collections::hash_map::DefaultHasher;
+
+fn main() -> io::Result<()> {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() > 1 {
+        for filename in &args[1..] {
+            let file = File::open(filename)?;
+            let reader = BufReader::new(file);
+            remove_duplicates(reader)?;
+        }
+    } else {
+        // No files provided, read from stdin
+        let stdin = io::stdin();
+        let reader = stdin.lock();
+        remove_duplicates(reader)?;
+    }
+
+    Ok(())
+}
+
+fn remove_duplicates<R: BufRead>(reader: R) -> io::Result<()> {
+    let mut seen_hashes = HashSet::new();
+    for line in reader.lines() {
+        let line = line?;
+        let mut hasher = DefaultHasher::new();
+        line.hash(&mut hasher);
+        let hash = hasher.finish();
+
+        if seen_hashes.insert(hash) {
+            println!("{}", line);
+        }
+    }
+
+    Ok(())
+}