General purpose makefile

[brickpop]

• Unified makefile and .env file
• General purpose .env variable names
• Single target network

• FFI permission scoped to upgrade tests only
• Single Node engine (bun)
• Removing unused imports
• Updated readme

[github-actions]

LCOV of commit ce7abe7 during Tests #1156

Summary coverage rate:
  lines......: 67.1% (2710 of 4037 lines)
  functions..: 70.9% (525 of 740 functions)
  branches...: 62.8% (159 of 253 branches)

Files changed coverage rate:
                                                        |Lines       |Functions  |Branches    
  Filename                                              |Rate     Num|Rate    Num|Rate     Num
  ============================================================================================
  script/SeedState.s.sol                                |    -      0|    -     0|    -      0
  script/deploy/DeployGauges.s.sol                      |    -      0|    -     0|    -      0
  script/deploy/DeployGaugesSeason.s.sol                |    -      0|    -     0|    -      0
  script/deploy/DeployGauges_v1_1_0.s.sol               |    -      0|    -     0|    -      0
  script/deploy/DeployGauges_v1_2_0.s.sol               |    -      0|    -     0|    -      0
  script/deploy/DeployGauges_v1_3_0.s.sol               |    -      0|    -     0|    -      0
  script/deploy/DeployGauges_v1_4_0.s.sol               |    -      0|    -     0|    -      0
  script/utils/GetDeploymentValues.sol                  |    -      0|    -     0|    -      0
  script/utils/GetDeploymentValues_v1_2_0.sol           |    -      0|    -     0|    -      0
  src/curve/LinearIncreasingCurve.sol                   |14.7%    197| 178%    27|    -      0
  src/curve/LinearIncreasingCurveNoSupply.sol           |21.9%    114|95.5%    22|    -      0
  src/delegation/EscrowIVotesAdapter.sol                |14.9%    195| 179%    24|    -      0