Add roadmap / milestones for v1 and v2

[ethanfrey]

Major achievements that are needed for these goals.

MVP Tasks

Beta Give feedback

1. Complete / expand documentation #97
   +0
   
2. Locked state of contracts return consistent response #93
   +0
3. Check FIXMEs
4. Explain ValueRange more #83
   +0

V1 Tasks

Beta Give feedback

1. Native-staking empty liens cleanup #101
   S +1
   
2. Use batch distribute_rewards for cross-chain distribution efficiency #77
   +0
   
3. Set up advanced CI tests #16
   +0
   
4. Send validator sync update messages on changing validator set #88
   +0
   
5. Implement Value Ranges instead of Locking #98
   +0
   
6. Expose pubkey of remote validators #72
   +0
7. Improve rewards withdrawal process #123
   +0
   
8. Improve cross-bond/unbond process #124
   +0
   
9. Questions about slashing in vault #32
   question +1
10. Implement Slashing #11
    +0
    
11. Price oracle contract #99
    +0
    
12. Add better documentation on slashing design #84
    +0
13. Slashing propagation accounting #139
    +0
    
14. Support multiple slash ratios #151
    +0
    
15. Native slashing accounting #129
    +0
    
16. Immediately release stake when possible #152
    +0
17. Slash using effective slashing ratio #173
    +0
    
18. Only slash undelegations that started after the misbehaviour #177
    +0
    

V2 Tasks

Beta Give feedback

1. Virtual staking zero max-cap behaviour #100
   S +1
2. Improve multi-tests #95
   +0
   
3. IBC improvements #96
   +0
4. virtual-staking: Unbonding from tombstoned validators #154
   +0
5. Native slashing SDK / routing mechanism #174
   +0
6. Native "immediate unbonding" mechanism #175
   +0
7. Misbehaviour evidence handling that is independent of the Consumer chain (ICS-like way) #176
   +0
8. Consumer chain mooning protection #172
   +0
9. Allow depositing vesting tokens in the vault #90
   +0
10. Design clean transition from locally staked tokens to cross-staked tokens #89
    +0

[maurolacy]

Created missing tasks, and added all tasks to either MVP, V1 or V2 milestones.

Leaving open for tracking / updates.

[maurolacy]

Updated task list for V2 / created relevant issues.