Add group experience share, level penalty, rarity point and specialis…

…t point services (#153)

- ExperienceShareService: each member's share of a group kill.
- LevelPenaltyService: experience and gold multipliers for monsters below the
  player's level.
- RarityPointService: stat points an equipment's rarity adds.
- SpecialistPointService: a card's skill points and the stat level they buy.
- DignityService.GetShopPriceMultiplier: NPC shop prices by dignity.

Each has an approval table under documentation/.

Closes #18
Closes #23
Closes #24
Closes #27
Closes #43


Claude-Session: https://claude.ai/code/session_014gSmkW4H42dDTduM5qrKt2

Co-authored-by: Claude <noreply@anthropic.com>

fix: correct the family experience table and extend it to level 30 (#130

)

Every row was wrong. Level 1 asked 100 000 against 80 000, level 7 asked
1 900 000 against 512 000, and the curve stopped at 19 where the game goes to
30. A family would have needed roughly triple the experience it should at the
top of the old table and then been unable to level at all.

From level 20 the requirement is the previous one plus a tenth, compounded
unrounded and floored, which is why those rows are not round.

Version bumped to 2.1.0.

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>

Update NosCore.Algorithm.csproj

Update NosCore.Algorithm.csproj

Merge pull request #56 from NosCoreIO/Dotnet6

add dotnet 6

Merge pull request #55 from Fizo55/master

Cleanup hp algorithm

Update NosCore.Algorithm.csproj

Update dotnet.yml

Merge pull request #46 from NosCoreIO/UpdateShared2

Update shared2

Update NosCore.Algorithm.csproj