[workflowsearcher] show more info about the workflows

[muescha]

i search a workflow by keyword. instead of just to see a short description i would like to find out more about the workflow

thats why i like to see more options:

• open github repository (release page)
• open author homepage
• show screenshot
• open thread at alfredforum ([workflowsearcher] add additional link to alfredforum #5)