Django-log-viewer

- [x] fix: issue newline 30 - possible happen because of "Not Found" exclude.
- [x] fix: implement black code style
- [x] fix: update locale messages
- [x] fix: enable Django test case, enable `test_logs_viewer`, added `test_get_log_files`, added `test_readlines_reverse`
- [x] feat: added `LOG_VIEWER_EXCLUDE_TEXT_PATTERN = <str:None>` (string regex expression to exclude the log from line)
- [x] feat: update doc string for some functions
- [x] feat: added GitHub issue template
- [x] feat: added GitHub run-test pipeline.

- [x] fix: support django 3.2 21 and patterns

- [x] merged 17 Fix: escape the HTML entity

- [x] Added Feature idea: download log files 8

- [x] fixed 11 (url pattern has error)

- [x] fixed 1 7 (Next Page button inoperable)
- [x] added `LOG_VIEWER_FILES_PATTERN = '*.log*'`