fix(ogImage): update socialImage path to include base URL if defined (#1858)

* fix(ogImage): update socialImage path to include base URL if defined

* feat(path): add function to check if a file path is absolute

* fix(ogImage): handle absolute paths for user defined og image paths

* docs(CustomOgImages): update socialImage property to accept full URLs

* fix(ogImage): typo

* fix(ogImage): improve user-defined OG image path handling

* Update docs/plugins/CustomOgImages.md

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

* Update quartz/plugins/emitters/ogImage.tsx

Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>

* refactor(path): remove isAbsoluteFilePath function

* fix(ogImage): update user-defined OG image path handling to support relative URLs

* feat(ogImage): enhance user-defined OG image path handling with absolute URL support

* refactor(ogImage): remove debug log for ogImagePath

* feat(path): add isAbsoluteURL function and corresponding tests

* refactor(path): remove unused URL import for isomorphic compatibility

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Co-authored-by: Karim H <karimh96@hotmail.com>
Co-authored-by: Jacky Zhao <j.zhao2k19@gmail.com>