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/Mem.bux

@@ -1,29 +1,29 @@
 module Std::Mem {
 
-extern func bux_alloc(size: uint) -> *void;
-extern func bux_realloc(ptr: *void, size: uint) -> *void;
-extern func bux_free(ptr: *void);
-extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
+    extern func bux_alloc(size: uint) -> *void;
+    extern func bux_realloc(ptr: *void, size: uint) -> *void;
+    extern func bux_free(ptr: *void);
+    extern func bux_mem_eq(a: *void, b: *void, size: uint) -> int;
 
-func Alloc(size: uint) -> *void {
-    return bux_alloc(size);
-}
+    func Alloc(size: uint) -> *void {
+        return bux_alloc(size);
+    }
 
-func Realloc(ptr: *void, size: uint) -> *void {
-    return bux_realloc(ptr, size);
-}
+    func Realloc(ptr: *void, size: uint) -> *void {
+        return bux_realloc(ptr, size);
+    }
 
-func Free(ptr: *void) {
-    bux_free(ptr);
-}
+    func Free(ptr: *void) {
+        bux_free(ptr);
+    }
 
-func MemEq(a: *void, b: *void, size: uint) -> bool {
-    return bux_mem_eq(a, b, size) != 0;
-}
+    func MemEq(a: *void, b: *void, size: uint) -> bool {
+        return bux_mem_eq(a, b, size) != 0;
+    }
 
-func New<T>() -> *T {
-    let sz: uint = sizeof(T);
-    return bux_alloc(sz) as *T;
-}
+    func New<T>() -> *T {
+        let sz: uint = sizeof(T);
+        return bux_alloc(sz) as *T;
+    }
 
 }