bshell: re-organise build into three separate components

bshell: the front-end binary
bshell.runtime: contains the parser, compiler, and classes needed to run bshell scripts
bshell.core: contains the builtin commandlets and aliases

bshell.runtime/runtime/var-map.h

@@ -0,0 +1,23 @@
+#ifndef BSHELL_RUNTIME_VAR_MAP_H_
+#define BSHELL_RUNTIME_VAR_MAP_H_
+
+#include <bshell/runtime/var.h>
+#include <bshell/status.h>
+
+struct var_map_entry {
+	bshell_variable *e_var;
+	fx_namemap_entry e_entry;
+};
+
+struct var_map {
+	fx_namemap m_vars;
+};
+
+extern void var_map_cleanup(struct var_map *map);
+
+extern enum bshell_status var_map_put(
+	struct var_map *map,
+	bshell_variable *var);
+extern bshell_variable *var_map_get(struct var_map *map, const char *name);
+
+#endif