fix compile_flags.txt to include correct paths

compile_flags.txt

@@ -3,8 +3,6 @@
 -xc++
 -nostdinc
 -Ibazel-bin/external/dawn/include
--Ibazel-bin/external/ada-url/_virtual_includes/ada-url/
--Ibazek-bin/external/simdutf/virtual_includes/simdutf/
 -Ibazel-bin/external/com_cloudflare_lol_html/_virtual_includes/lolhtml
 -Ibazel-bin/external/perfetto/
 -Iexternal/perfetto-sdk/sdk/

docs/development.md

@@ -0,0 +1,17 @@
+# Development
+
+## Compile flags
+
+In order to fix Intellisense issues in VSCode and several other IDEs related to missing header files in C++ dependencies such as `ada-url` and `simdutf`, you need to generate a `compile_commands.json` document. Follow the steps below to fix the issue:
+
+1.  Install `gen-compile-commands`
+
+```sh
+cargo install --git https://github.com/mikea/gen-compile-commands`
+```
+
+2.  Generate `compile_commands.json`
+
+```sh
+gen-compile-commands --root . --compile-flags compile_flags.txt --out compile_commands.json --src-dir ./src
+```