New docs

docs/configuration/build-profiles.md

@@ -1,2 +1,39 @@
 # Build profiles
 
+DCR supports two profiles:
+
+- `debug` (default)
+- `release`
+
+## How to select
+
+```sh
+dcr build --debug
+dcr build --release
+dcr run --release
+dcr clean --debug
+```
+
+## Default profile flags
+
+### GCC/Clang-like toolchains
+
+- `debug`: `-O0 -g -Wall -Wextra -fno-omit-frame-pointer -DDEBUG`
+- `release`: `-O3 -DNDEBUG -march=native`
+
+### MSVC toolchain
+
+- `debug`: `/Od /Zi /W4 /DDEBUG /Oy-`
+- `release`: `/O2 /DNDEBUG`
+
+## Artifacts
+
+By default:
+
+- `target/debug/<name>` (or `.exe` on Windows)
+- `target/release/<name>` (or `.exe` on Windows)
+
+Static library mode (`kind = "staticlib"`):
+
+- Linux/macOS: `lib<name>.a`
+- Windows: `<name>.lib`