Compatibility fixes and new api implementations (tline, deli) to make kroom8 run

[cherepets]

• I confirm that I am the author of this code and release it to the open8 project under the MIT license. This contribution does not contain code from other sources, including code generated by a Large Language Model ("AI").

Description

Basically what I did is I run this game from terminal, and checked where it failed in the output.

• Loading didn't work because of literals in 0x.f, fixed in patch_cart_code(), not in interpreter.
• all(nil) - just return 0
• pal(nil, 2) - just use 0 as a default value
• pico8_stat(38 || 39) - just return 0, it's mouse movement for dev mode (which is not (yet?) supported)
• pal(nil) - unset color set by pal(nil, 2)
• implemented tline() - it's basically how the walls are drawn, not sure which algo does original pico-8 use but looked decent
• implemented deli(i) - delete by index i
• also fix add(t, val, i) to act like insert instead of replace

Note: the game is still not actually playable, it just boots and renders the environment

Existing Issue(s)

tline - #4

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

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🟢 Metrics 54 complexity · 0 duplication

Metric	Results
Complexity	54
Duplication	0

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[mupfdev]

Thanks, highly appreciated.

PS: I just sent you a collaborator invite. If you accept, you can directly push to the main repo.