Improve log search

[sharkpc138]

Description

• Regular expressions is used as a tool to query logs under various conditions without immediately implementing LogQL, but some users find it challenging to use regex
• There is a need to offer a more intuitive and simpler LogQL or selection options
• The current log format is as follows:

  CRI log:  {RFC 3339Nano timestamp} {stdout/stderr} {Partial/Full} {log}
  File log: {RFC 3339Nano timestamp} {log}
  

Concerns

• Categorize logs based on specific keywords without using indexing
• Achieve indexing-like effects without depending on log formats