fix: update connector links and streamline icon components

- Changed Linkup API link from linkup.ai to linkup.so in the connector popup.
- Removed unused IconSparkles and replaced it with Luma SVG in the connector icons.
- Updated image properties for Linear, GitHub, Google Calendar, Google Gmail, and Google Drive connectors to ensure consistent sizing.
- Replaced old SVG files for GitHub, Google Calendar, Google Drive, Google Gmail, and Linear with new versions for improved visuals.

surfsense_web/public/connectors/google-gmail.svg

@@ -1,44 +1 @@
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-	.st3{fill:#FBBC04;}
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-	.st6{fill:#1E88E5;}
-	.st7{fill:#E53935;}
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-	.st9{fill:#FBC02D;}
-	.st10{fill:#1565C0;}
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-	.st13{fill:#E54335;}
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-	.st15{fill:#34A353;}
-	.st16{clip-path:url(#SVGID_2_);}
-	.st17{fill:#188038;}
-	.st18{opacity:0.2;fill:#FFFFFF;enable-background:new    ;}
-	.st19{opacity:0.3;fill:#0D652D;enable-background:new    ;}
-	.st20{clip-path:url(#SVGID_4_);}
-	.st21{opacity:0.3;fill:url(#_45_shadow_1_);enable-background:new    ;}
-	.st22{clip-path:url(#SVGID_6_);}
-	.st23{fill:#FA7B17;}
-	.st24{opacity:0.3;fill:#174EA6;enable-background:new    ;}
-	.st25{opacity:0.3;fill:#A50E0E;enable-background:new    ;}
-	.st26{opacity:0.3;fill:#E37400;enable-background:new    ;}
-	.st27{fill:url(#Finish_mask_1_);}
-	.st28{fill:#FFFFFF;}
-	.st29{fill:#0C9D58;}
-	.st30{opacity:0.2;fill:#004D40;enable-background:new    ;}
-	.st31{opacity:0.2;fill:#3E2723;enable-background:new    ;}
-	.st32{fill:#FFC107;}
-	.st33{opacity:0.2;fill:#1A237E;enable-background:new    ;}
-	.st34{opacity:0.2;}
-	.st35{fill:#1A237E;}
-	.st36{fill:url(#SVGID_7_);}
-	.st37{fill:#FBBC05;}
-	.st38{clip-path:url(#SVGID_9_);fill:#E53935;}
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-	.st40{clip-path:url(#SVGID_13_);fill:#E53935;}
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