Collapse long blocks in readme

Author: patrickroberts

README.md

@@ -82,7 +82,8 @@ target_link_libraries(yourlib PUBLIC beman::any_view)
 
 ## Reference
 
-Synopsis:
+<details>
+<summary>Synopsis</summary>
 
 ```cpp
 namespace beman::any_view {
@@ -158,6 +159,8 @@ inline constexpr bool std::ranges::enable_borrowed_range<
         bool(OptsV & beman::any_view::any_view_options::borrowed);
 ```
 
+</details>
+
 ## Building
 
 There are workflows available in CMake presets such as `gcc-debug`:
@@ -168,6 +171,9 @@ cmake --workflow --preset gcc-debug
 
 Alternatively you can manually configure, build, and test with CMake and CTest:
 
+<details>
+<summary>Example output</summary>
+
 ```bash
 cmake -B build
 cmake --build build
@@ -261,6 +267,8 @@ Test project /home/patrick/projects/any_view/build/gcc-debug
 Total Test time (real) =   0.15 sec
 ```
 
+</details>
+
 ## Contributing
 
 Please do! Issues and pull requests are appreciated.