tt CLI (2.10): show logs with `tt tcm logs`

Product: tt CLI
Since: tt 2.10.0
Dev ticket: https://github.com/tarantool/tt/commit/7fd3e0548fa4d0e6c320422602c9f78dce0b43f2
Root document: https://www.tarantool.io/en/doc/latest/tooling/tt_cli/tcm/

SME: @ oleg-jukovec @ dmyger

Details

This commit introduces the ability to view TCM logs using
the tt tcm log command.

This command works in couple with the tt tcm start command,
and show the logs of the TCM process that was running by it.

Command expect exists tcm.log file in the current directory.

Usage example:

tt tcm log --lines 100 --follow

This command will show the last 100 lines of the TCM log
file and continue to follow the log output.
This feature is useful for monitoring the TCM process.
Without the --follow flag, it will show the last 100 lines
of the log file and exit.

The command also supports following flags:

• --no-color to disable colored output
• --no-format to disable structured output

Possible output:

{
  time: **2025-05-29T17:19:47.905335965+03:00**
  level: INFO
  msg: _tcm stopped_
  source: {
    file: "tcm/internal/app/tcm/server/server.go",
    function: "tcm/internal/server.(*TcmAPI).Close",
    line: 175
  }
}
{
  time: **2025-05-29T17:19:47.90451709+03:00**
  level: WARN
  msg: _retrying of unary invoker failed_
  attempt: 0,
  error: "rpc error: code = Canceled desc = latest balancer error:
    last connection error: connection error: desc = \"transport:
    Error while dialing: dial tcp 127.0.0.1:2379: connect:
    connection refused\"",
  source: {
    file: "go.etcd.io/etcd/client/v3@v3.5.15/retry_interceptor.go",
    function: "v3.(*Client).unaryClientInterceptor.func1",
    line: 63
  },
  target: "etcd-endpoints://0xc0003d2000/127.0.0.1:2379"
}
{
  time: **2025-05-29T17:19:47.90548212+03:00**
  level: ERROR
  msg: _fail to get entity from etcd_
  err: "context canceled",
  path: "/cluster/",
  source: {
    file: "tcm/internal/app/tcm/server.go",
    function: "tcm/internal/app/tcm/server.(*TcmAPI).validationKV",
    line: 17
  }
}

Closes #TNTP-1103

Start with the linked TCM root document and inspect how existing tt tcm commands are documented. Add the command's usage, --lines and --follow behavior, and the --no-color and --no-format flags, resolving whether the command is named log or logs. Done means the TCM log viewing workflow and example are documented accurately.