EPIC: release advanced Network commands for experimentation

[lumtis]

Group the list of tasks in order to consider releasing the advanced network commands for experimentation: voucher management and incentivized testnets

• Add section(s) in documentation for experimental advanced features cli#3117
• Make thorough experimentations with n reward release cli#3116
• network prepare: support mainnets launch cli#1811
• network prepare: support updating balance of existing genesis accounts in genesis #153
• network: add genesis verification for special allocations cli#2472
• Network publish: --shares option doesn't work cli#2544
• Rename "campaign" to "project" in ignite network set of commands cli#2947
• Network projects: add commands for voucher management #162
• Network projects: add commands for account management cli#3120