feat: implement test mode

[zeroqn]

brief

This pr add test mode. In test mode, godwoken will stop produce new block and expose following jsonrpc methods

• tests_produce_block
• tests_should_produce_block
• tests_get_global_state

To produce an new block, we make a jsonrpc to tests_produce_block.

config change

[test_mode]
enable = false

Add above entry to config.toml

jsonrpc

method tests_produce_block

Update on-chain global state. Right now only produce new block is supported.

method tests_should_produce_block

Whether this node has right to produce next block

method tests_get_global_state

Return on-chain global state

Example

echo '{
    "id": 2,
    "jsonrpc": "2.0",
    "method": "tests_produce_block",
    "params": ["none"]
}' \
| tr -d '\n' \
| curl -H 'content-type: application/json' -d @- \
http://localhost:8119//

echo '{
    "id": 2,
    "jsonrpc": "2.0",
    "method": "tests_should_produce_block",
    "params": []
}' \
| tr -d '\n' \
| curl -H 'content-type: application/json' -d @- \
http://localhost:8119

echo '{
    "id": 2,
    "jsonrpc": "2.0",
    "method": "tests_get_global_state",
    "params": []
}' \
| tr -d '\n' \
| curl -H 'content-type: application/json' -d @- \
http://localhost:8119/