feat: lifetime elision, tooling CI, registry, and LSP locals

Ship the QUALITY_PLAN stretch from ownership through ecosystem: C.1
lifetime elision (bootstrap + selfhost), bux fmt/test/doc CI hooks,
stdlib goldens, package registry (bux search/add), and LSP 0.4
position-sensitive locals with inferred let types. Full-tree format
pass plus Map/Set remove double-free fix.

lib/Math.bux

@@ -1,44 +1,44 @@
 module Std::Math {
 
-extern func bux_sqrt(x: float64) -> float64;
-extern func bux_pow(x: float64, y: float64) -> float64;
-extern func bux_abs_i64(x: int64) -> int64;
-extern func bux_abs_f64(x: float64) -> float64;
-extern func bux_min_i64(a: int64, b: int64) -> int64;
-extern func bux_max_i64(a: int64, b: int64) -> int64;
-extern func bux_min_f64(a: float64, b: float64) -> float64;
-extern func bux_max_f64(a: float64, b: float64) -> float64;
+    extern func bux_sqrt(x: float64) -> float64;
+    extern func bux_pow(x: float64, y: float64) -> float64;
+    extern func bux_abs_i64(x: int64) -> int64;
+    extern func bux_abs_f64(x: float64) -> float64;
+    extern func bux_min_i64(a: int64, b: int64) -> int64;
+    extern func bux_max_i64(a: int64, b: int64) -> int64;
+    extern func bux_min_f64(a: float64, b: float64) -> float64;
+    extern func bux_max_f64(a: float64, b: float64) -> float64;
+
+    func Sqrt(x: float64) -> float64 {
+        return bux_sqrt(x);
+    }
+
+    func Pow(x: float64, y: float64) -> float64 {
+        return bux_pow(x, y);
+    }
+
+    func Abs(n: int64) -> int64 {
+        return bux_abs_i64(n);
+    }
+
+    func AbsF(f: float64) -> float64 {
+        return bux_abs_f64(f);
+    }
+
+    func Min(a: int64, b: int64) -> int64 {
+        return bux_min_i64(a, b);
+    }
+
+    func Max(a: int64, b: int64) -> int64 {
+        return bux_max_i64(a, b);
+    }
+
+    func MinF(a: float64, b: float64) -> float64 {
+        return bux_min_f64(a, b);
+    }
+
+    func MaxF(a: float64, b: float64) -> float64 {
+        return bux_max_f64(a, b);
+    }
 
-func Sqrt(x: float64) -> float64 {
-    return bux_sqrt(x);
 }
-
-func Pow(x: float64, y: float64) -> float64 {
-    return bux_pow(x, y);
-}
-
-func Abs(n: int64) -> int64 {
-    return bux_abs_i64(n);
-}
-
-func AbsF(f: float64) -> float64 {
-    return bux_abs_f64(f);
-}
-
-func Min(a: int64, b: int64) -> int64 {
-    return bux_min_i64(a, b);
-}
-
-func Max(a: int64, b: int64) -> int64 {
-    return bux_max_i64(a, b);
-}
-
-func MinF(a: float64, b: float64) -> float64 {
-    return bux_min_f64(a, b);
-}
-
-func MaxF(a: float64, b: float64) -> float64 {
-    return bux_max_f64(a, b);
-}
-
-}