F remove boost rdep

Summary

1. Boost is being hidden behind an agnostic API and thus boost is a pure build-dependency now. (see #45 (closed))
2. This MR also fixes a segfault (when calling “GetFileDescriptor().wrapped->path()” after Retrieval).

Focus

Boost is being used for the interaction with the (local) filesystem and for logging. So removing Boost as a runtime-dependency means moving code which mentions boost from our *.h to our *.cpp files. This affects mostly configuration and logging classes.

Most important changes are:

1. we provide a wrapper for the boost logger class which hides the boosty stuff
2. we hide all of boost's logging macros and replace them by our own. Since we already had those macros defined in our public API it shouldn't break anything.

Test Environment

Tests for the segfault bug are in caosdb-cppinttest!22 (merged)

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include/caosdb/entity.h

@@ -47,6 +47,7 @@
 #include <string>                     // for string, basic...
 #include <utility>                    // for move
 #include <vector>                     // for vector
+// IWYU pragma: no_include "net/proto2/public/repeated_field.h"
 
 namespace caosdb::entity {
 using caosdb::entity::v1::IdResponse;