release: Bux v1.0.0 language freeze

Bump compiler banners and package version to 1.0.0, activate SEMVER policy,
and add RELEASE_v1.0.0 notes. Fix closure auto-Drop leaking outer Array
drops into nested capture bodies (iter_hof). Fmt-clean examples/src for CI.

apps/nexus/src/Main.bux

@@ -87,7 +87,7 @@ module Main {
         let tlsEnv: String = Os_GetEnv("NEXUS_TLS");
         if String_Len(tlsEnv) > 0 {
             if String_Eq(tlsEnv, "1") || String_Eq(tlsEnv, "true") || String_Eq(tlsEnv, "on") ||
-               String_Eq(tlsEnv, "https") {
+            String_Eq(tlsEnv, "https") {
                 config.tlsEnabled = true;
             }
         }