Fix bug in user type variable assignment

• 4092443: Fix bug with assigning null to a user type field where the incorrect type of heap value would be assigned to the heap. This would cause the script to die in game since the user type doesn't exist in VRChat so Odin can't know how to deserialize it. Reported by @nnaaanachi

Add more descriptive error messages

• 24f6262: Add more descriptive error for failing to find a symbol or method
• fe68128: Make errors about methods not being exposed to Udon a little more clear
• c9b7be2: Fix var not inferring the correct type for user defined type assignments.

Fix error line offset

• e9ccf6a: Fix line offset on errors printed to the console, reported by @Foorack

Fix chained user field accesses breaking

• 2560bf6: Fix chained accesses of user defined fields not maintaining their type correctly. Reported by @Foorack

Fix passing arrays to method params arguments

• aaf9474: Fix passing arrays of parameters to params method arguments, reported by @Foorack

Fix inspector breaking with comma separated public field declarations

• 593751b: Fix null reference exception in the inspector drawing due to attributes on comma separated declarations of fields not getting propagated to every field properly. Reported by @Varneon7

Bug fixes

• 71ed575: Fix exception on substring in exception watcher with negative length substrings, reported by @VowganDesign
• 1f4704b: More complete type reference finding to capture properties' and fields' return types as referenced types in the exposure tree view
• 726ae77: Fix issue with namespaces not getting handled correctly as using statements in some cases
• ea574fe: Fix issue with the runtime exception watcher sometimes failing to initialize and causing error spam in the output log

Add support for more field attributes

• b4880d1: Add support for Space, Header, ColorUsage, GradientUsage, and TextArea attributes on public fields
• 048b7fb: Add support for SerializeField attribute
• 5f68839: Add support for Tooltip field attribute
• 44afc6f: Add checks for tweening mode on synced variables
• a711a63: Minor compiler optimizations

Compiler performance improvements

• abe77da: Remove use of regex replacement that was taking ages, in profile builds with profiling markers it was taking >50% of the compile time.
• abe77da: Add null type caching to type lookup

Fix null reference exception when settings object is not populated

• 83372c5: Reported by @Phasedragon