Add convert data command

[jeparlefrancais]

Closes #139

This PR add a new convert command to darklua to convert data files (json, yaml or toml) into a Lua module.

• add entry to the changelog
• update docs

[github-actions]

Coverage after merging convert-data-command into main will be

86.90%

Coverage Report for Changed Files

File	Stmts	Branches	Funcs	Lines	Uncovered Lines
src
bin.rs	89.74%	100%	100%	88.57%	41–42, 44–45
src/cli
convert.rs	88.66%	100%	71.43%	91.57%	13, 21, 86, 89, 91
mod.rs	69.23%	100%	58.33%	74.07%	18, 26–27
src/frontend
error.rs	70.34%	100%	60%	71.58%	107–112, 118–120, 122–124, 163, 168, 17, 176, 190, 217–221, 231–234, 236, 240–245, 258–263, 267–272, 276–281, 285–290, 302–303, 316–317, 319–320, 337, 346, 379, 381, 386–387, 405–409, 412–417, 73
mod.rs	75.53%	100%	70%	76.19%	57–60, 71–74, 92–97
src/rules/bundle
mod.rs	87.97%	100%	87.50%	88.07%	105–109, 17, 33–37, 39, 73
src/rules/bundle/path_require_mode
mod.rs	85.31%	100%	89.47%	85.02%	101–103, 120–122, 126–128, 130, 180, 206–208, 223–225, 235–237, 259, 295–298, 326–327, 333–339, 349–350, 359, 36, 360–361