Allow plugin to load without a valid mapping present. That way updating should go a bit smoother. Improve java api usage and update java unsupported message. Fix issue with corrupted recommendations. Currently bukkit-only MiniPlaceholders support. 1.21.4 support.

Changes
1022724 Rewrite "scary" java compatibility message
9e6ce2e Update more java apis
4214851 Update java api usage
df9fda5 Do not fail loading the plugin if no mapping was found
e210b01 Handle corrupted recommendations
94b535a Update dependency com.viaversion:viabackwards-common to v5.2.0 ( #1851)
174e5b0 Update dependency dev.architectury:architectury-fabric to v15 ( #1848)
6ba6bf2 Update dependency dev.architectury:architectury-neoforge to v15 ( #1849)
8283f5c Update dependency com.github.cryptomorin:XSeries to v12 ( #1850)
0cbecf8 Update all non-major dependencies ( #1842)
36c9a69 Update dependency dev.architectury:architectury to v15 ( #1847)
b0ca485 New Crowdin updates ( #1844)
32618b5 Fix startup
c0b83e9 Fix compilation
6a03ef8 Implement miniplaceholders support
6811dc6 Add 1.21.4 mapping
d627295 New Crowdin updates ( #1843)
797be0e Update all non-major dependencies ( #1841)
10a1e58 Update all non-major dependencies ( #1837)
72418f8 New translations locale.json (French) ( #1839)
094620e Update all non-major dependencies ( #1836)