dev-util/google-antigravity{,-ide}: streamline URL handlers

Fold URL handler .desktop file into the main .desktop file and tweak
associated MIME types and Exec= lines.

Signed-off-by: Florian Albrechtskirchinger <falbrechtskirchinger@gmail.com>

dev-util/google-antigravity-ide/files/antigravity-ide-url-handler.desktop

@@ -1,12 +0,0 @@
-[Desktop Entry]
-Name=Antigravity IDE - URL Handler
-Comment=Experience liftoff
-GenericName=Text Editor
-Exec=/opt/google/antigravity-ide/bin/antigravity-ide --open-url %U
-Icon=antigravity-ide
-Type=Application
-NoDisplay=true
-StartupNotify=true
-Categories=Utility;TextEditor;Development;IDE;
-MimeType=x-scheme-handler/antigravity;
-Keywords=vscode;

dev-util/google-antigravity-ide/files/antigravity-ide.desktop

@@ -2,13 +2,13 @@
 Name=Antigravity IDE
 Comment=Experience liftoff
 GenericName=Text Editor
-Exec=/opt/google/antigravity-ide/bin/antigravity-ide %F
+Exec=/opt/google/antigravity-ide/bin/antigravity-ide %U
 Icon=antigravity-ide
 Type=Application
 StartupNotify=false
 StartupWMClass=antigravity-ide
 Categories=TextEditor;Development;IDE;
-MimeType=application/x-code-workspace;
+MimeType=text/plain;inode/directory;application/x-code-workspace;x-scheme-handler/antigravity-ide;
 Actions=new-empty-window;
 Keywords=vscode;
 
@@ -24,5 +24,5 @@ Name[ko]=새 빈 창
 Name[ru]=Новое пустое окно
 Name[zh_CN]=新建空窗口
 Name[zh_TW]=開新空視窗
-Exec=/opt/google/antigravity-ide/bin/antigravity-ide --new-window %F
+Exec=/opt/google/antigravity-ide/bin/antigravity-ide --new-window
 Icon=antigravity-ide

dev-util/google-antigravity-ide/google-antigravity-ide-2.0.3.ebuild

@@ -121,7 +121,6 @@ src_install() {
 	fperms 4711 "/${AGY_HOME}/chrome-sandbox"
 
 	domenu "${FILESDIR}/${MY_PN}.desktop"
-	domenu "${FILESDIR}/${MY_PN}-url-handler.desktop"
 	newicon -s scalable "${ED}/${AGY_HOME}/resources/app/resources/linux/code.png" ${MY_PN}.png
 
 	insinto /usr/share/metainfo