Add print_rich() support to Debug Console

[jnoel-dev]

Adds print_rich()/bbcode support to Debug Console
Sets Debug Console text color to grey (To match Godot console output)
Changes how lines are outputted to Debug Console. (Previously was printing lines in chunks/groups instead of line by line)

Limitations:

1. Debug console will still parse bbcode in regular print() statements. I am not sure if there is a way to determine if print_rich() was used...
2. Not supported for Godot 3.6 or below
3. [center] and [right] tags are emulated with spaces. May not be accurate depending on terminal size.

Tested working on Linux, Windows
Tested working on Godot4.4b3,Godot4.3

using this to parse https://github.com/jnoel-dev/bbcode-to-ansi based on @Calinou 's https://github.com/Calinou/godot-bbcode-to-ansi

before

after

[Calinou]

Changes how lines are outputted to Debug Console. (Previously was printing lines in chunks/groups instead of line by line)

Does this PR close #791?