1. Added support to show preview of screenshot
2. Fixed a linter issue

Added support for the following commands:

1. Rekey Device: Rekey specified device based on the signing password ("brightscript.remoteControl.signingPassword") and package file ("brightscript.remoteControl.signedPackagePath") provided.

2. Create Package: This will present user a list of available launch configs to choose from. Once selected it will create a .zip file and .pkg file based on the config and will save them  to the ${workspacefolder}/out

3. Rekey Device and Create Package: This will first rekey device and then create package for the selected launch config

Updates based on below reqs:

rekey:
a) "How do you want to enter your stuff?"
 - "Pick from json file"
 - "Enter manually"
b) prompt for host (prepopulated from json above if possible)
c) Prompt for password (prepopulated from json above if possible)
d) Prompt for signed package path (prepopulated from json above if available)

package:
a) "What should we package?"
 - "Pick a folder"
 - "Pick from a launch.json"
    - show a launch.json option picker
 - "Pick a rokudeploy.json"
	-

b) prompt for host (prepopulated from json above if possible)
c) Prompt for password (prepopulated from json above if possible)
d) Prompt for signed package path (prepopulated from json above if available)
e) Show a summary of stuff, ask to click "Yes, do it" or "No, something's wrong, cancel".

…htscript-language into TBD-126

…htscript-language into TBD-126

1. Added support to show existing pkg file for rekey confirmation
2. Updated create package flow to confirm all the entries with user and ti update - if needed

Added support to maintain status of previously selected host and config

…ghtscript-language into TBD-126

updated rekey and create package flow

1. updated outfile name to be the source folder name only
2. Fixed a bug for outdir that only supported mac paths
3. Added title to all inputboxes
4. Added a prompt for rootDir incase it is missing during create package
5. Added outfile path in dialog upon successful packaging

…ghtscript-language into TBD-126

Added support to show package path in successful dialog and an option to open package in file explorer

…htscript-language into TBD-126