feat: add drogon_ctl build and run subcommands

[wangshuo-wsws]

Summary

Adds drogon_ctl build and drogon_ctl run so scaffolded projects can be compiled and started without dropping to raw cmake/make (#2529).

• build: creates ./build if needed, runs cmake -S . -B build, then cmake --build build
• run: builds first, locates the project(...) target binary under build/ (including multi-config Debug/Release dirs), then executes it
• Extra args: cmake configure flags before --; application args after --
• Appears in drogon_ctl help like other top-level commands

Test plan

• drogon_ctl create project demo && cd demo && drogon_ctl build configures and builds
• drogon_ctl run starts the demo binary after a successful build
• drogon_ctl help build / drogon_ctl help run show the new detail text
• drogon_ctl build -- -DCMAKE_BUILD_TYPE=Release forwards the flag to cmake

Closes #2529