internal/rosa/package: migrate many libraries

This also adds more string helpers.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/package/libconfig/package.az

@@ -0,0 +1,15 @@
+package libconfig {
+	description = "a simple library for processing structured configuration files";
+	website = "https://hyperrealm.github.io/libconfig";
+	anitya = 1580;
+
+	version* = "1.8.2";
+	source = remoteGitHub {
+		suffix = "hyperrealm/libconfig";
+		tag = "v"+version;
+		checksum = "fD32hjeAZuTz98g6WYHRwsxphrgrEFqxi5Z1jlJemPckPBfxpS3i5HgshAuA6vmT";
+	};
+	patches = [ "disable-broken-tests.patch" ];
+
+	exec = cmake {};
+}