feat: bun runtime

[fernandolguevara]

related #267

[hassandraga]

Thank you @fernandolguevara for the Bun engine support, I appreciate it.
For now, I can't merge this PR for those reasons:

• I'm about to push a commit with a heavy core changes, therefor I prefer to merge this PR after core update
• The example call_bun is not necessary, but will be good to have bun_test.ts in serve_a_folder example
• No need for code formatting because if hard to check all changes made to webui.c

Please wait until the next commit then update this PR or create a new one.

[hassandraga]

Because there are too many merging conflicts, and this PR did not get updated yet, I had to manually copy the PR and implement it (0440eea). Thank you @fernandolguevara for your contribution.