Add padding and bunch of improvements (#249)

* Add padding and bunch of improvements

* Add basic html entities and escape chars(maybe)

* Improve escape char handling

* Add CompeDocumentation highlight group

* Documentation improvements

* Change var name

* Fix documentation bug

* Update vital modules

* Update vital modules

* Improve suggest_offset

* - Avoid GC for perf
- Refactor callback handling

* Avoid restoring flicker

* Improce helper

* Improve convert_lsp