Add embed sanity check and spc-config command

[crazywhalecc]

What does this PR do?

• Add embed sanity check and spc-config command
• Fix php embed sapi：undefinded reference to 'sigsetjmp' #564
• Fix feat: add support for libphp and the embed SAPI #153 (comment)
• Fix Add embed SAPI sanity check #567

Example

# spc-config
bin/spc spc-config apcu,pgsql,openssl,curl --with-libs=nghttp2 --libs

# Output:
# -L/home/jerry/project/static-php-cli/buildroot/lib -lphp -lc -lcurl -lnghttp2 -lpq -lpgport -lpgcommon -lreadline -lncurses -lssl -lcrypto -lxml2 -lz -liconv -lcharset

# Build in embed SAPI
/usr/local/musl/bin/x86_64-linux-musl-gcc path-to-code.c $(bin/spc spc-config $EXTENSIONS) -static -o test
./test

Checklist before merging

If your PR involves the changes mentioned below and completed the action, please tick the corresponding option.
If a modification is not involved, please skip it directly.

• If it's an extension or dependency update, make sure adding related extensions in src/global/test-extensions.php.
• If you changed the behavior of static-php-cli, update docs in ./docs/.
• If you updated config/xxx.json content, run bin/spc dev:sort-config xxx.

[crazywhalecc]

That being said, one way or another it would be great to be able to retrieve the list of libs to pass to the compiler and linker for using static-php-cli in scripts!

@dunglas To prevent bugs like pgsql from happening again, I introduced embed sanity check and spc-config (replace php-config). This may improve FrankenPHP's build script.

If you have any suggestions, that would be great.

[dunglas]

Wow, thank you, great enhancement for us.