Actionable Leads mechanic

[Xymanek]

• Facilities are no longer unlocked when contacting their region - the only way to access them is by researching leads

• Researching a lead converts it to a "actionable lead" - internal counter in CI (or a resource in XCom HQ, need to see implementation-wise)

• When exiting form a facility mission (success or fail), the number of actionable leads is decremented by 1

• When the number of actionable leads is 1 or above, all facility missions are unlocked. When the number falls to 0, all facility missions are locked

  • This allows player to pick which one they want to assault

• The current number of actionable leads is displayed in the resource bar when looking at the facility mission blades

• The avatar project is slowed down by 15%

• The lead research time is reduced by 20%

Full original discussion here: https://discordapp.com/channels/578606792448409610/639832893211934721/699578932487520279

Note: the design is not finalized

[Xymanek]

Results of more discussions:

• Having a relay in same region as the facility removes the need for the leads (for that facility)
• Facility lead chain requirements:
  • Removed: having a relay built
  • Added: having 2+ pips globally from facilities
• Black market has a guaranteed lead for sale, until you buy it

Will need to use several CHL hooks:

• https://github.com/X2CommunityCore/X2WOTCCommunityHighlander/pull/474/commits/65f75ba77ce4cd31bb145a83b78bef4575435ab7
• https://github.com/X2CommunityCore/X2WOTCCommunityHighlander/blob/e760415df9bc3b64e7b28b7c8c0b35cb5794550c/X2WOTCCommunityHighlander/Src/XComGame/Classes/XComGameState_WorldRegion.uc#L652-L671 + https://github.com/X2CommunityCore/X2WOTCCommunityHighlander/blob/e760415df9bc3b64e7b28b7c8c0b35cb5794550c/X2WOTCCommunityHighlander/Src/XComGame/Classes/XComGameState_WorldRegion.uc#L726-L734