v0.2.0

feat: docx-pdf conversion  (#40)

* feat(document): add a way to convert pdf to docx using libreoffice

* feat(documents): add the ability to convert docx to pdf using libreoffice

* test(document): test both new features

* ci(github-actions): install libreoffice on github actions

* refactor(files): add a new method to the file interface to support mime types as they can differ from the know extensions

* refactor(documents): add a new constant to the document package for docx

* refactor(files): add the new method to every struct that implements the file interface

* build(docker): install libreoffice at the release stage

* docs(readme): add a new table on what's new in terms of file conversion

* build(dockerfile): replace debian bookworm with debian trixie just to have more up to date image

* refactor(pdf): add two buffers as stdout and stderr to see what's goin on at the time to convert pdf to docx

* fix(pdf): use %q to make the filename a double-quoted string safely escaped with Go syntax

* refactor(pdf): print the stderr when it is not empty

* refactor(docx): replicate the changes added to the pdf file