P. J. McDermott 2993757315 Add a CI check for missing images in WML macros
This detects image errors such as issue #8432.

Example output:

    data/multiplayer/scenarios/2p_Aethermaw.cfg:134: missing image: units/undead/shadow-s-attack-1.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:135: missing image: units/undead/shadow-n-attack-2.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:147: missing image: units/undead/shadow-n-3.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:149: missing image: units/undead/shadow-s-attack-4.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:196: missing image: units/human-loyalists/spearman-attack-se-10.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:197: missing image: units/human-loyalists/spearman-attack-s-6.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:198: missing image: units/human-loyalists/spearman-attack-se-9.png
    data/multiplayer/scenarios/2p_Aethermaw.cfg:203: missing image: units/human-loyalists/general-idle-5.png
2024-03-26 13:23:22 -05:00
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