docs: fix typos in comments and user-facing messages

[Avicennasis]

Summary

Fix 13 typos across 5 files - comments, godoc lines and user-facing CLI messages. No functional changes.

command/service_cmd.go - copy-paste in godoc comments (three functions all documented as "updates a service"):

• // DeleteServiceAction updates a service in OpsGenie -> deletes a service
• // GetServiceAction updates a service in OpsGenie -> gets a service
• // ListServiceAction updates a service in OpsGenie -> lists services

command/integration_policy_cmd.go - successfuly -> successfully (4 occurrences, in enable/disable messages for both policy and integration). The repo already spells it successfully everywhere else.

command/heartbeat_cmd.go

• Sedning to Opsgenie... -> Sending to Opsgenie...
• Ping request has received. -> Ping request has been received.

command/command.go

• package doc: implementations that uses OpsGenie API clients -> that use
• // isEmpty method check is the given argument is empty or not. -> checks if the given argument
• log line: Logging to file is disabled, To enable Logging to file Please specify logPath -> Logging to file is disabled. To enable logging to file, please specify logPath

command/log_cmd.go

• but proceding rest of the log files -> but proceeding with the rest of the log files

Notes

Five of the changes are inside user-facing output strings rather than comments, so they will change CLI stdout/stderr text: the four successfully messages, the two heartbeat DEBUG messages, the command.go INFO log line and the log_cmd.go DEBUG line. They are all human-readable prose (not machine-parsed keys), and the repo has no test files, so nothing asserts on them - but flagging it for review in case anything downstream greps this output.

Deliberately left alone:

• The Can not -> Cannot phrasing. It appears 14 times across 11 files and is clearly the house convention; "can not" is a valid spelling, and changing only some of them would leave the repo inconsistent.
• governed by a Apache Software license in the copyright headers of command/command.go and cfg/lamp_config.go - boilerplate legal header text.
• gofmt reports every file in command/, cfg/ and lamp.go as unformatted already, including files this PR does not touch. I did not run gofmt -w, to keep the diff to the typo fixes.