Replace C browser client with headless Chrome

Cargo.toml

@@ -15,6 +15,7 @@ cc = "1.3.0"
 diesel = { version = "2.3.11", features = ["sqlite", "returning_clauses_for_sqlite_3_35", "64-column-tables"] }
 diesel_migrations = "2.3.2"
 git2 = { version = "0.20.4", features = ["vendored-libgit2", "vendored-openssl"] }
+headless_chrome = "1.0.22"
 iced = { version = "0.14.0", features = ["advanced", "highlighter", "image-without-codecs", "markdown", "svg", "tokio"] }
 image = { version = "0.25.10", default-features = false, features = ["gif", "jpeg", "png", "webp"] }
 memmap2 = "0.9.11"