Squash improve-ide-compat into main

Fixes GH-5

- cppcheck replaced with clang-tidy
- clang-tidy lint warnings fixed
- Reworked build tools from scratch to make IDE setup easier
- Added 1.5 IDE setup guides

tools/embed/embed.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
 usage = \
-'''Usage: embed.py --cpp OUT_CPP --header OUT_H [--] [INPUT as PATH]...
+'''Usage: %(me)s --cpp OUT_CPP --header OUT_H [--] [INPUT as PATH]...
 Generate C++ source code that includes binary contents of INPUT files.
 
 Each file in INPUT is stored as a resource: a static array of unsigned char.
@@ -79,6 +79,7 @@ def main():
                 fail(f"Unknown option '{arg}'")
 
         elif considerOptions and (arg == '-h' or arg == '--help'):
+            print(usage % {'me': os.path.basename(sys.argv[0])})
             sys.exit(0)
 
         elif considerOptions and arg == '--':
@@ -237,8 +238,8 @@ namespace {
 
     mid=\
 '''
-    std::unordered_map<std::string,
-                       __embedded_resources::EmbeddedResource>
+    const std::unordered_map<std::string,
+                             __embedded_resources::EmbeddedResource>
     EMBEDDED_RESOURCES =
     {
 ''',